题目内容
下面各题怎样简便就怎样计算
①5.02-1.37-2.63
②
×（
+
）+0.8
③1.25×2.5×32
④11÷〔
×（
+
）〕
①5.02-1.37-2.63
②
| 12 |
| 5 |
| 5 |
| 6 |
| 1 |
| 2 |
③1.25×2.5×32
④11÷〔
| 6 |
| 11 |
| 3 |
| 4 |
| 1 |
| 6 |
①5.02-1.37-2.63
=5.02-（1.37+2.63）
=5.02-4
=1.02；
②
×（
+
）+0.8
=
×
+
×
+0.8
=2+1.2+0.8
=4；
③1.25×2.5×32
=1.25×2.5×（8×4）
=（1.25×8）×（2.5×4）
=10×10
=100；
④11÷〔
×（
+
）〕
=11÷[
×
]
=11÷
=11×2
=22．
=5.02-（1.37+2.63）
=5.02-4
=1.02；
②
| 12 |
| 5 |
| 5 |
| 6 |
| 1 |
| 2 |
=
| 12 |
| 5 |
| 5 |
| 6 |
| 12 |
| 5 |
| 1 |
| 2 |
=2+1.2+0.8
=4；
③1.25×2.5×32
=1.25×2.5×（8×4）
=（1.25×8）×（2.5×4）
=10×10
=100；
④11÷〔
| 6 |
| 11 |
| 3 |
| 4 |
| 1 |
| 6 |
=11÷[
| 6 |
| 11 |
| 9+2 |
| 12 |
=11÷
| 1 |
| 2 |
=11×2
=22．
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