2024-11-4 14:50| 查看: 8
乘法的初步认识
1.
2.
3.
4.
(1)△△ △△ △△ △△ △△ △△
2+2+2+2+2+2=12
6×2=12, 2×6=12
(2)△△△△△△ △△△△△△
6+6=12
2×6=12, 6×2=12
5.
(1)4, 5, 20
(2)7×2
6.
2×2=4
4×4=16
2×7=14
(本题答案不唯一)