题目内容
计算下面各题,怎样算简便就怎样算.
9.43-2.6+8.57-3.4
12×(
+
-
)
375+450÷18×2
5(
+
)÷
+
.
9.43-2.6+8.57-3.4
12×(
| 1 |
| 4 |
| 1 |
| 6 |
| 1 |
| 3 |
375+450÷18×2
5(
| 4 |
| 5 |
| 1 |
| 4 |
| 7 |
| 3 |
| 7 |
| 10 |
(1)9.43-2.6+8.57-3.4,
=(9.43+8.57)-(2.6+3.4),
=18-6,
=12;
(2)12×(
| 1 |
| 4 |
| 1 |
| 6 |
| 1 |
| 3 |
=12×
| 1 |
| 4 |
| 1 |
| 6 |
| 1 |
| 3 |
=3+2-4,
=5-4,
=1;
(3)375+450÷18×25,
=375+25×25,
=375+625,
=1000;
(4)(
| 4 |
| 5 |
| 1 |
| 4 |
| 7 |
| 3 |
| 7 |
| 10 |
=
| 21 |
| 20 |
| 7 |
| 3 |
| 7 |
| 10 |
=
| 9 |
| 20 |
| 7 |
| 10 |
=
| 23 |
| 20 |
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