题目内容
下面“
12×5”中错误的算法是[
]
A .12×5 |
B .12×5 |
|
=10 ×5+2×5 |
=6 ×5+6×5 |
|
C.12×5 | D.12×5 | |
=6×2×5 |
=9×5+2×5 |
|
=2×5×6 |
答案:D
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选择题
(把正确答案的选项填入括号里.)下面“
18×3”中错误的算法是[
]
A .18×3=20×3+8×3 |
B .18×3=20×3-8×3 |
C .18×3=6×3×3 =3×3×6 |
D .18×3=10×3+8×3 |
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 |