Question

【题目】看谁算得又对又快

2×5 = 4 × 6 = 5 ×3 = 8 ×5 =

5 +5 = 5×5 = 3 × 5= 2 ×9 =

7×4 = 3×6 = 6×5 = 4 ×1=

4× 8 = 7 ×3 = 4 × 4 = 4 + 4 =

Answer 1

【答案】10 24 15 40 10 25 15 18 28 18 30 4 32 21 16 8

【解析】

2×5=10；4×6=24；5×3=15；8×5=40；

5+5=10；5×5=25；3×5=15；2×9=18；

7×4=28；3×6=18；6×5=30；4×1=4；

4×8=32；7×3=21；4×4=16；4+4=8

根据乘法口诀直接口算出积即可。