题目内容
计算,能简算的写出简算过程.
(1)7.5÷
-2.5×
(2)3.5×
+5.5×80%+0.8
(3)24×[(1
-
)÷3]
(4)3.25-2.8×
+
×
÷0.1.
(1)7.5÷
| 2 |
| 5 |
| 5 |
| 2 |
(2)3.5×
| 4 |
| 5 |
(3)24×[(1
| 1 |
| 6 |
| 2 |
| 3 |
(4)3.25-2.8×
| 5 |
| 7 |
| 1 |
| 4 |
| 4 |
| 7 |
(1)7.5÷
| 2 |
| 5 |
| 5 |
| 2 |
=7.5×
| 5 |
| 2 |
| 5 |
| 2 |
=(7.5-2.5)×
| 5 |
| 2 |
=5×
| 5 |
| 2 |
=
| 25 |
| 2 |
(2)3.5×
| 4 |
| 5 |
=3.5×0.8+5.5×0.8+0.8,
=(3.5+5.5+1)×0.8,
=10×0.8,
=8;
(3)24×[(1
| 1 |
| 6 |
| 2 |
| 3 |
=24×[
| 1 |
| 2 |
=24×
| 1 |
| 6 |
=4;
(4)3.25-2.8×
| 5 |
| 7 |
| 1 |
| 4 |
| 4 |
| 7 |
=3.25-2+
| 1 |
| 7 |
=3.25-2+
| 10 |
| 7 |
=1.25+
| 10 |
| 7 |
=2
| 19 |
| 28 |
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