题目内容
| 计算(能简算的要简算,并写出简算过程). (
| (100-19)÷(1.63+1.07) | ||||||
| 18.7-3.375-6.625 | 6+
|
①(
+
)×45,
=
×45+
×45,
=30+6,
=36;
②(100-19)÷(1.63+1.07),
=81÷2.7,
=30;
③18.7-3.375-6.625,
=18.7-(3.375+6.625),
=18.7-10,
=8.7;
④6+
÷
×
,
=6+
×3×
,
=6+
,
=
.
| 2 |
| 3 |
| 2 |
| 15 |
=
| 2 |
| 3 |
| 2 |
| 15 |
=30+6,
=36;
②(100-19)÷(1.63+1.07),
=81÷2.7,
=30;
③18.7-3.375-6.625,
=18.7-(3.375+6.625),
=18.7-10,
=8.7;
④6+
| 2 |
| 3 |
| 1 |
| 3 |
| 3 |
| 4 |
=6+
| 2 |
| 3 |
| 3 |
| 4 |
=6+
| 3 |
| 2 |
=
| 15 |
| 2 |
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