题目内容
脱式计算.
(1)8-2
| (2)30.8-22.2×0.5÷0.37 | ||||||||
(3)7.8-(3
| (4)[10+(1.2-
|
(1)8-2
×2
÷1
,
=8-
÷1
,
=8-
,
=4.7;
(2)30.8-22.2×0.5÷0.37,
=30.8-11.1÷0.37,
=30.8-30,
=0.8;
(3)7.8-(3
-2.75)×1
,
=7.8-1×1
,
=7.8-1
,
=6.55;
(4)[10+(1.2-
)÷0.11]×
,
=[10+0.55÷0.11]×
,
=[10+5]×
,
=15×
,
=6.
| 1 |
| 5 |
| 1 |
| 7 |
| 3 |
| 7 |
=8-
| 33 |
| 7 |
| 3 |
| 7 |
=8-
| 33 |
| 10 |
=4.7;
(2)30.8-22.2×0.5÷0.37,
=30.8-11.1÷0.37,
=30.8-30,
=0.8;
(3)7.8-(3
| 3 |
| 4 |
| 1 |
| 4 |
=7.8-1×1
| 1 |
| 4 |
=7.8-1
| 1 |
| 4 |
=6.55;
(4)[10+(1.2-
| 13 |
| 20 |
| 2 |
| 5 |
=[10+0.55÷0.11]×
| 2 |
| 5 |
=[10+5]×
| 2 |
| 5 |
=15×
| 2 |
| 5 |
=6.
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