Whiz Kids Math Worksheet - Answers Sheet-#1 Base-10 Math Multiplication using numbers between 10 and 60 -------------------------------------------------------------------------- --19--------18--------17--------16--------15------------------------------ -x11-------x12-------x13-------x14-------x15------------------------------ -209-------216-------221-------224-------225------------------------------ -------------------------------------------------------------------------- *Written Solution same for all Problems: (It is as simple as A B C.) (11 x 19 = 209)(12 x 18 = 216)(13 x 17 = 221)(14 x 16 = 224)(15 x 15 = 225) --------------------------------------------------------------------------- *First Step - Add the first numerical value of the multiplier to the multiplicand which is ( 19 + 1 ) = 20 ; and subtract ( 1 ) from the multiplier which is ( 11 - 1 ) = 10. -------------------------------------------------------------------------- *Second Step - Multiply the results of the first step which are ( 10 x 20 ) = 200. -------------------------------------------------------------------------- *Third Step - Multiply the first numerical values of both the multiplier (11) and the multiplicand (19) which are ( 1 x 9 ) = 9 ; and then add the results of the partial products of the second and third steps which are ( 200 + 9 ) = 209 the product. -------------------------------------------------------------------------- --29--------28--------27--------26--------25------------------------------ -x21-------x22-------x23-------x24-------x25------------------------------ -609-------616-------621-------624-------625------------------------------ -------------------------------------------------------------------------- *Written Solution same for all Problems: (It is as simple as A B C.) (21 x 29 = 609)(22 x 28 = 616)(23 x 27 = 621)(24 x 26 = 624)(25 x 25 = 625) --------------------------------------------------------------------------- *First Step - Add the first numerical value of the multiplier to the multiplicand which is ( 29 + 1 ) = 30 ; and subtract ( 1 ) from the multiplier which is ( 21 - 1 ) = 20. --------------------------------------------------------------------------- *Second Step - Multiply the results of the first step which are ( 20 x 30 ) = 600. --------------------------------------------------------------------------- *Third Step - Multiply the first numerical values of both the multiplier (21) and the multiplicand (29) which are ( 1 x 9 ) = 9 ; and then add the results of the partial products of the second and third steps which are ( 600 + 9 ) = 609 the product. -------------------------------------------------------------------------- --39--------38--------37--------36--------35------------------------------ -x31-------x32-------x33-------x34-------x35------------------------------ 1209------1216------1221------1224------1225------------------------------ -------------------------------------------------------------------------- *Written Solution same for all Problems: (It is as simple as A B C.) (31 x 39 = 1209)(32 x 38 = 1216)(33 x 37 = 1221)(34 x 36 = 1224)(35 x 35 = 1225) -------------------------------------------------------------------------- *First Step - Add the first numerical value of the multiplier to the multiplicand which is ( 39 + 1 ) = 40 ; and subtract ( 1 ) from the multiplier which is ( 31 - 1 ) = 30. -------------------------------------------------------------------------- *Second Step - Multiply the results of the first step which are ( 30 x 40 ) = 1200. -------------------------------------------------------------------------- *Third Step - Multiply the first numerical values of both the multiplier (31) and the multiplicand (39) which are ( 1 x 9 ) = 9 ; and then add the results of the partial products of the second and third steps which are ( 1200 + 9 ) = 1209 the product. ------------------------------------------------------------------------- --49--------48--------47--------46--------45----------------------------- -x41-------x42-------x43-------x44-------x45----------------------------- 2009------2016------2021------2024------2025----------------------------- ------------------------------------------------------------------------- *Written Solution same for all Problems: (It is as simple as A B C.) (41 x 49 = 2009)(42 x 48 = 2016)(43 x 47 = 2021)(44 x 46 = 2024)(45 x 45 = 2025) ------------------------------------------------------------------------- *First Step - Add the first numerical value of the multiplier to the multiplicand which is ( 49 + 1 ) = 50 ; and subtract ( 1 ) from the multiplier which is ( 41 - 1 ) = 40. ------------------------------------------------------------------------ *Second Step - Multiply the results of the first step which are ( 40 x 50 ) = 2000. ----------------------------------------------------------------------- *Third Step - Multiply the first numerical values of both the multiplier (41) and the multiplicand (49) which are ( 1 x 9 ) = 9 ; and then add the results of the partial products of the second and third steps which are ( 2000 + 9 ) = 2009 the product. ------------------------------------------------------------------------ --59--------58--------57--------56--------55---------------------------- -x51-------x52-------x53-------x54-------x55---------------------------- 3009------3016------3021------3024------3025---------------------------- ------------------------------------------------------------------------ *Written Solution same for all Problems: (It is as simple as A B C.) (51 x 59 = 3009)(52 x 58 = 3016)(53 x 57 = 3021)(54 x 56 = 3024)(55 x 55 = 3025) ------------------------------------------------------------------------ *First Step - Add the first numerical value of the multiplier to the multiplicand which is ( 59 + 1 ) = 60 ; and subtract ( 1 ) from the multiplier which is ( 51 - 1 ) = 50. ---------------------------------------------------------------------- *Second Step - Multiply the results of the first step which are ( 50 x 60 ) = 3000. ----------------------------------------------------------------------- *Third Step - Multiply the first numerical values of both the multiplier (51) and the multiplicand (59) which are ( 1 x 9 ) = 9 ; and then add the results of the partial products of the second and third steps which are ( 3000 + 9 ) = 3009 the product. ----------------------------------------------------------------------- --69--------68--------67--------66--------65--------------------------- -x61-------x62-------x63-------x64-------x65--------------------------- 4209------4216------4221------4224------4225--------------------------- ----------------------------------------------------------------------- *Written Solution same for all Problems: (It is as simple as A B C.) (61 x 69 = 4209)(62 x 68 = 4216)(63 x 67 = 4221)(64 x 66 = 4224)(65 x 65 = 4225) ----------------------------------------------------------------------- *First Step - Add the first numerical value of the multiplier to the multiplicand which is ( 69 + 1 ) = 70 ; and subtract ( 1 ) from the multiplier which is ( 61 - 1 ) = 60. ----------------------------------------------------------------------- *Second Step - Multiply the results of the first step which are ( 60 x 70 ) = 4200. ----------------------------------------------------------------------- *Third Step - Multiply the first numerical values of both the multiplier (61) and the multiplicand (69) which are ( 1 x 9 ) = 9 ; and then add the results of the partial products of the second and third steps which are ( 4200 + 9 ) = 4209 the product. ----------------------------------------------------------------------- *Whiz Kids Math Worksheet - Answers Sheet-#2 *Base-10 Math Multiplication using numbers between 70 and 110 ----------------------------------------------------------------------- --79--------78--------77--------76--------75--------------------------- -x71-------x72-------x73-------x74-------x75--------------------------- 5609------5616------5621------5624------5625--------------------------- ----------------------------------------------------------------------- *Written Solution same for all Problems: (It is as simple as A B C.) (71 x 79 = 5609)(72 x 78 = 5616)(73 x 77 = 5621)(74 x 76 = 5624)(75 x 75 = 5625) ----------------------------------------------------------------------- *First Step - Add the first numerical value of the multiplier to the multiplicand which is ( 79 + 1 ) = 80 ; and subtract ( 1 ) from the multiplier which is ( 71 - 1 ) = 70. ----------------------------------------------------------------------- *Second Step - Multiply the results of the first step which are ( 70 x 80 ) = 5600. ----------------------------------------------------------------------- *Third Step - Multiply the first numerical values of both the multiplier (71) and the multiplicand (79) which are ( 1 x 9 ) = 9 ; and then add the results of the partial products of the second and third steps which are ( 5600 + 9 ) = 5609 the product. ----------------------------------------------------------------------- --89--------88--------87--------86--------85--------------------------- -x81-------x82-------x83-------x84-------x85--------------------------- 7209------7216------7221------7224------7225--------------------------- ----------------------------------------------------------------------- *Written Solution same for all Problems: (It is as simple as A B C.) (81 x 89 = 7209)(82 x 88 = 7216)(83 x 87 = 7221)(84 x 86 = 7224)(85 x 85 = 7225) ----------------------------------------------------------------------- *First Step - Add the first numerical value of the multiplier to the multiplicand which is ( 89 + 1 ) = 90 ; and subtract ( 1 ) from the multiplier which is ( 81 - 1 ) = 80. ----------------------------------------------------------------------- *Second Step - Multiply the results of the first step which are ( 80 x 90 ) = 7200. ----------------------------------------------------------------------- *Third Step - Multiply the first numerical values of both the multiplier (81) and the multiplicand (89) which are ( 1 x 9 ) = 9 ; and then add the results of the partial products of the second and third steps which are ( 7200 + 9 ) = 7209 the product. ----------------------------------------------------------------------- --99--------98--------97--------96--------95--------------------------- -x91-------x92-------x93-------x94-------x95--------------------------- 9009------9016------9021------9024------9025--------------------------- ----------------------------------------------------------------------- *Written Solution same for all Problems: (It is as simple as A B C.) (91 x 99 = 9009)(92 x 98 = 9016)(93 x 97 = 9021)(94 x 96 = 9024)(95 x 95 = 9025) ---------------------------------------------------------------------- *First Step - Add the first numerical value of the multiplier to the multiplicand which is ( 99 + 1 ) = 100 ; and subtract ( 1 ) from the multiplier which is ( 91 - 1 ) = 90. ---------------------------------------------------------------------- *Second Step - Multiply the results of the first step which are ( 90 x 100 ) = 9000. --------------------------------------------------------------------- *Third Step - Multiply the first numerical values of both the multiplier (91) and the multiplicand (99) which are ( 1 x 9 ) = 9 ; and then add the results of the partial products of the second and third steps which are ( 9000 + 9 ) = 9009 the product. ------------------------------------------------------------------- ---109--------108--------107--------106--------105----------------- --x101-------x102-------x103-------x104-------x105----------------- 11,009-----11,016-----11,021-----11,024-----11,025----------------- ------------------------------------------------------------------- *Written Solution same for all Problems: (It is as simple as A B C.) (101 x 109 = 11,009)(102 x 108 = 11,016)(103 x 107 = 11021)(104 x 106 = 11,024) (105 x 105 = 11,025) ------------------------------------------------------------------- *First Step - Add the first numerical value of the multiplier to the multiplicand which is ( 109 + 1 ) = 110 ; and subtract ( 1 ) from the multiplier which is ( 101 - 1 ) = 100. ------------------------------------------------------------------- *Second Step - Multiply the results of the first step which are ( 100 x 110 = 11,000. ------------------------------------------------------------------- *Third Step - Multiply the first numerical values of both the multiplier (100) and the multiplicand (109) which are ( 1 x 9 ) = 9 ; and then add the results of the partial products of the second and third steps which are ( 11,000 + 9 ) = 11,009 the product. --------------------------------------------------------------- Visit our Base-10 Math Web Site at: http://www.abcbiblemath.com Visit our Base-10 Math Multiplication E-Book at:http://www.abcbiblemath.com/whizkidsmathebooks.html ------------------------------------------------------------- MAY BE PHOTOCOPIED FOR PERSONAL OR SCHOOL USE ONLY.-----------