题目内容
下面各题,怎样简便就怎样算,写出主要过程.
(3618÷18-145)×29
36×(
-
)
3.4-5.8+7.6-2.2
(0.8+
)÷
+0.25.
(3618÷18-145)×29
36×(
| 11 |
| 12 |
| 7 |
| 9 |
3.4-5.8+7.6-2.2
(0.8+
| 1 |
| 4 |
| 3 |
| 5 |
(1)(3618÷18-145)×29,
=(201-145)×29,
=56×29,
=1624;
(2)36×(
-
),
=36×
-36×
,
=33-28,
=5;
(3)3.4-5.8+7.6-2.2,
=(3.4+7.6)-(5.8+2.2),
=11-8,
=3;
(4)(0.8+
)÷
+0.25,
=1.05÷0.6+0.25,
=1.75+0.25,
=2.
=(201-145)×29,
=56×29,
=1624;
(2)36×(
| 11 |
| 12 |
| 7 |
| 9 |
=36×
| 11 |
| 12 |
| 7 |
| 9 |
=33-28,
=5;
(3)3.4-5.8+7.6-2.2,
=(3.4+7.6)-(5.8+2.2),
=11-8,
=3;
(4)(0.8+
| 1 |
| 4 |
| 3 |
| 5 |
=1.05÷0.6+0.25,
=1.75+0.25,
=2.
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