题目内容
选择题.
下面“
12×5”中错误的算法是[
]
A .12×5 |
B .12×5 |
C .12×5 |
=10 ×5+2×5 |
=6 ×5+6×5 |
=6 ×2×5 |
=2 ×5×6 |
||
D .12×5 |
||
=9 ×5+2×5 |
答案:D
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选择题
下面错误的题是:
[
]
A .16×4 |
B .28-20÷4 |
=2×4×8 |
=8÷4 |
=64 |
=2 |
C .12+6×3 |
D .50-4×5 |
=12+18 |
=50-20 |
=30 |
=30 |