题目内容
脱式计算.(怎样简便怎样算)
51.7+46.05÷1.5-9.3
857×1.9-8.57×80-85.7
÷((
+
)×
)
27×(
+
)×25
45×(
+
-
)
÷(4÷
)+
.
51.7+46.05÷1.5-9.3
857×1.9-8.57×80-85.7
| 4 |
| 15 |
| 4 |
| 7 |
| 4 |
| 21 |
| 7 |
| 12 |
27×(
| 2 |
| 9 |
| 2 |
| 5 |
45×(
| 7 |
| 9 |
| 4 |
| 15 |
| 3 |
| 5 |
| 6 |
| 11 |
| 2 |
| 3 |
| 10 |
| 33 |
(1)51.7+46.05÷1.5-9.3,
=51.7+30.7-9.3,
=82.4-9.3,
=73.1;
(2)857×1.9-8.57×80-85.7,
=857×1.9-857×0.8-857×0.1,
=857×(1.9-0.8-0.1),
=857×1,
=857;
(3)
| 4 |
| 15 |
| 4 |
| 7 |
| 4 |
| 21 |
| 7 |
| 12 |
=
| 4 |
| 15 |
| 16 |
| 21 |
| 7 |
| 12 |
=
| 4 |
| 15 |
| 4 |
| 9 |
=
| 3 |
| 5 |
(4)27×(
| 2 |
| 9 |
| 2 |
| 5 |
=27×
| 2 |
| 9 |
| 2 |
| 5 |
=150+270,
=420;
(5)45×(
| 7 |
| 9 |
| 4 |
| 15 |
| 3 |
| 5 |
=45×
| 7 |
| 9 |
| 4 |
| 15 |
| 3 |
| 5 |
=35+12-27,
=47-27,
=20;
(6)
| 6 |
| 11 |
| 2 |
| 3 |
| 10 |
| 33 |
=
| 6 |
| 11 |
| 10 |
| 33 |
=
| 1 |
| 11 |
| 10 |
| 33 |
=
| 13 |
| 33 |
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