题目内容
脱式计算,能简算的要简算
| 22.3-2.45-5.3-4.55 |
| [43.3×(2-75%)+7]×
| ||||||||||||||
|
| 12-
|
(1)22.3-2.45-5.3-4.55,
=(22.3-5.3)-(2.45+4.55),
=17-7,
=10;
(2)
| 9 |
| 20 |
| 1 |
| 2 |
| 2 |
| 5 |
| 1 |
| 3 |
=
| 9 |
| 20 |
| 1 |
| 2 |
| 11 |
| 15 |
=
| 9 |
| 20 |
| 11 |
| 30 |
=
| 27 |
| 22 |
(3)[43.3×(2-75%)+7]×
| 1 |
| 2 |
=[43.3×1.25+7]×
| 1 |
| 2 |
=[54.125+7]×
| 1 |
| 2 |
=61.125×
| 1 |
| 2 |
=30.5625;
(4)
| 9 |
| 20 |
| 9 |
| 20 |
=
| 9 |
| 20 |
=
| 9 |
| 20 |
=45;
(5)
| 5 |
| 9 |
| 4 |
| 9 |
=
| 1 |
| 9 |
| 1 |
| 9 |
=
| 2 |
| 9 |
(6)12-
| 6 |
| 13 |
| 9 |
| 26 |
| 2 |
| 3 |
=12-
| 4 |
| 3 |
| 2 |
| 3 |
=12-(
| 4 |
| 3 |
| 2 |
| 3 |
=12-2,
=10.
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