问题
解答题
计算．
|
答案
= =
= = |
| 2 |
| 3 |
| 3 |
| 5 |
=
×5×2 3 5 3
=
；50 9
×3 4
÷4 9 2 7
=
×3 4
×4 9 7 2
=
；7 6
÷5 14
×3 5 3 4
=
×5 14
×5 3 3 4
=
；25 56
×4 5
÷3 7 3 25
=
×4 5
×3 7 25 3
=
．20 7
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