Page 17 - 01-Yr5_Front cover-ccp.indd

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Reasonable approximations:
a 1 O x 1 5 = 150 b 20 x 1 O = 200
c 20 x 1 5 = 300 d 20 x 1 3 = 260
e 20 x 1 O = 200 f 20 x 1 O = 200

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Practical: draw arrays of the Practical: draw quick diagrams Practical: draw quick diagrams Complete Resource Master 15.
dimensions in DJ. which illustrate these answers. which illustrate these answers.
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a 10 x 10 = 100 b 10 x 10 = 100 a 10 x 10 = 100 b 10 x 10 = 100 a 20 x 20 = 400 b 30 x 20 = 600
10 x 2 = 20 10 x 6 = 60 10 x 5= 50 10 x 6= 60 20 x B = 160 30 x 7 = 210 Practical: draw two diagrams
10 x 2 = 20 10 x 4 = 40 10 x 2= 20 10 x 6= 60 20 x 5 = 100 20 x 4= BO illustrating these answers for each
2 x 2 = 4 6x 4 = 24 5x 2= 10 6x 6= 36 Bx 5= 40 7x 4= 2B of the sums.
144 224 lBO 256 700 QlB
a 25 x 30 = 750 35 x 20 = 700
c 10 x 10 = 100 d 10 x 10 = 100 c 10 x 10 = 100 d 10 x 10 = 100 c 30 x 30 = qoo d 40 x 30 = 1 200 25 x 5 = 125 35 x 5 = 175
10 x B= BO 10 x q= qo 10 x 7= 70 10 x 3= 30 30 x q = 270 40 x 3= 120 B75 B75
10 x 5= 50 10 x 3= 30 10 x 7= 70 10 x 1 = 10 30 x 2= 60 30 x 6= lBO
Bx 5= 40 Qx 3= 27 7x 7= 4q 3x 1 = 3 Qx 2= lB 6x 3= lB b 37 x 20 = 740 22 x 30 = 660
270 247 2BQ 143 124B 151B 37 x 2= 74 22 x 7 = 154
B14 B14
e 10 x 10 = 100 f 10 x 10 = 100 e 10 x 10 = 100 f 10 x 10 = 100 e 50 x 40 = 2000 f 60 x 50 = 3000
10 x 4= 40 10 x 7= 70 10 x 5= 50 10 x q= qo 50 x 6= 300 60 x 5= 300 c 61 x 40 = 2440 44 x 60 = 2640
10 x 4= 40 10 x 1 = 10 10 x 5= 50 10 x B= BO 40 x 2= BO 50 x 5= 250 61x 4= 244 44 x 1 = 44
4x 4= 16 7x 1 = 7 5x 5= 25 Qx B= 72 6x 2= 12 5x 5= 25 26B4 26B4
1Q6 1B7 225 342 23Q2 3575