题目内容
计算下面各题.(能简便的要简便)
(1)(
+
-
)×18
(2)3.7×6+3.7×4
(3)1.25×32×0.25
(4)(50-40×1.2)÷0.5.
(1)(
| 1 |
| 6 |
| 1 |
| 2 |
| 1 |
| 3 |
(2)3.7×6+3.7×4
(3)1.25×32×0.25
(4)(50-40×1.2)÷0.5.
(1)(
+
-
)×18,
=
×18+
×18-
×18,
=3+9-6,
=6;
(2)3.7×6+3.7×4,
=3.7×(6+4),
=3.7×10,
=37;
(3)1.25×32×0.25,
=1.25×8×4×0.25,
=(1.25×8)×(4×0.25),
=10×1,
=10;
(4)(50-40×1.2)÷0.5,
=(50-48)÷0.5,
=2÷0.5,
=4.
| 1 |
| 6 |
| 1 |
| 2 |
| 1 |
| 3 |
=
| 1 |
| 6 |
| 1 |
| 2 |
| 1 |
| 3 |
=3+9-6,
=6;
(2)3.7×6+3.7×4,
=3.7×(6+4),
=3.7×10,
=37;
(3)1.25×32×0.25,
=1.25×8×4×0.25,
=(1.25×8)×(4×0.25),
=10×1,
=10;
(4)(50-40×1.2)÷0.5,
=(50-48)÷0.5,
=2÷0.5,
=4.
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