题目内容
在括号里填上合适的数,使下列各题能用简便方法计算,写出简算过程;
10-
-______
(
+
)×______
÷______+
×
.
10-
| 4 |
| 7 |
(
| 2 |
| 5 |
| 2 |
| 3 |
| 7 |
| 9 |
| 5 |
| 11 |
| 2 |
| 9 |
①10-
| 4 |
| 7 |
| 3 |
| 7 |
=10-(
| 4 |
| 7 |
| 3 |
| 7 |
=10-1,
=9;
②(
| 2 |
| 5 |
| 2 |
| 3 |
=
| 2 |
| 5 |
| 2 |
| 3 |
=6+10,
=16;
③
| 7 |
| 9 |
| 11 |
| 5 |
| 5 |
| 11 |
| 2 |
| 9 |
=
| 7 |
| 9 |
| 5 |
| 11 |
| 5 |
| 11 |
| 2 |
| 9 |
=(
| 7 |
| 9 |
| 2 |
| 9 |
| 5 |
| 11 |
=1×
| 5 |
| 11 |
=
| 5 |
| 11 |
故答案为:
| 3 |
| 7 |
| 11 |
| 5 |
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