1实践应用答案
4×3 = 12
4个4 4×4 = 16
5 × 2 = 10
2达标检测第1题答案
(1)2 × 4 = 8(只)或4 × 2 = 8(只)
(2)3 × 5 = 15(只)或5 × 3 = 15(只)
3达标检测第2题答案
(1)A
(2)A
4达标检测第3题答案
(1)3 × 6 6 × 3