题目内容
计算下列各题，要写出主要计算过程，能用简便方法的要用简便方法计算．
| ①16×18-120÷15 | ②3.2×2.77+0.23×3.2 | ③7.6-2.05÷0.82 | ||||||||||||||||||||
④
| ⑤
| ⑥13÷（
|
①16×18-120÷15，
=288-8，
=280；
②3.2×2.77+0.23×3.2，
=3.2×（2.77+0.23），
=3.2×3，
=9.6；
③7.6-2.05÷0.82，
=7.6-2.5，
=5.1；
④
| 7 |
| 8 |
| 5 |
| 17 |
| 9 |
| 8 |
| 12 |
| 17 |
=（
| 7 |
| 8 |
| 9 |
| 8 |
| 5 |
| 17 |
| 12 |
| 17 |
=2-1，
=1；
⑤
| 2 |
| 9 |
| 7 |
| 16 |
| 2 |
| 9 |
=
| 2 |
| 9 |
| 7 |
| 16 |
=
| 2 |
| 9 |
| 9 |
| 16 |
=
| 1 |
| 8 |
⑥13÷（
| 1 |
| 4 |
| 5 |
| 6 |
| 3 |
| 4 |
=13÷
| 13 |
| 12 |
| 3 |
| 4 |
=12×
| 3 |
| 4 |
=9．
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