题目内容
| 脱式计算（能简算的要简算，写出主要步骤） ①3.6-2.8+7.4-7.2 | ②
| ||||||||||||||
③（
| ④18÷[
| ||||||||||||||
| ⑤3.8×0.73+0.73×6.2 | ⑥3.27×99+3.27． |
①3.6-2.8+7.4-7.2
=（3.6+7.4）-（2.8+7.2）
=11-10
=1；
②
÷23+
×
+
=（
+
+1）×
=2×
=
；
③（
+
）÷
-
=
÷
-
=
-
=
；
④18÷[
+（
-
）]
=18÷[
+
]
=18÷
=16；
⑤3.8×0.73+0.73×6.2
=（3.8+6.2）×0.73
=10×0.73
=7.3；
⑥3.27×99+3.27
=3.27×（99+1）
=3.27×100
=327．
=（3.6+7.4）-（2.8+7.2）
=11-10
=1；
②
| 8 |
| 17 |
| 1 |
| 23 |
| 9 |
| 17 |
| 1 |
| 23 |
=（
| 8 |
| 17 |
| 9 |
| 17 |
| 1 |
| 23 |
=2×
| 1 |
| 23 |
=
| 2 |
| 23 |
③（
| 1 |
| 2 |
| 1 |
| 3 |
| 3 |
| 5 |
| 17 |
| 18 |
=
| 5 |
| 6 |
| 3 |
| 5 |
| 17 |
| 18 |
=
| 25 |
| 18 |
| 17 |
| 18 |
=
| 4 |
| 9 |
④18÷[
| 5 |
| 6 |
| 5 |
| 8 |
| 1 |
| 3 |
=18÷[
| 5 |
| 6 |
| 7 |
| 24 |
=18÷
| 27 |
| 24 |
=16；
⑤3.8×0.73+0.73×6.2
=（3.8+6.2）×0.73
=10×0.73
=7.3；
⑥3.27×99+3.27
=3.27×（99+1）
=3.27×100
=327．
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