题目内容
简便计算.
(1)46.7-15.03-4.97
(2)1.25×2.5×0.8×40
(3)13÷2.5
(4)(
+
)×4+
.
(1)46.7-15.03-4.97
(2)1.25×2.5×0.8×40
(3)13÷2.5
(4)(
| 1 |
| 9 |
| 1 |
| 27 |
| 23 |
| 27 |
(1)46.7-15.03-4.97,
=46.7-(15.03+4.97),
=46.7-20,
=26.7;
(2)1.25×2.5×0.8×40,
=1.25×0.8×2.5×40,
=(1.25×0.8)×(2.5×40),
=1×100,
=100;
(3)13÷2.5,
=(13×4)÷(2.5×4),
=52÷10,,
=5.2,
(4)(
+
)×4+
,
=
×4+
×4+
,
=
+
+
,
=
+(
+
),
=
+1,
=1
.
=46.7-(15.03+4.97),
=46.7-20,
=26.7;
(2)1.25×2.5×0.8×40,
=1.25×0.8×2.5×40,
=(1.25×0.8)×(2.5×40),
=1×100,
=100;
(3)13÷2.5,
=(13×4)÷(2.5×4),
=52÷10,,
=5.2,
(4)(
| 1 |
| 9 |
| 1 |
| 27 |
| 23 |
| 27 |
=
| 1 |
| 9 |
| 1 |
| 27 |
| 23 |
| 27 |
=
| 4 |
| 9 |
| 4 |
| 27 |
| 23 |
| 27 |
=
| 4 |
| 9 |
| 4 |
| 27 |
| 23 |
| 27 |
=
| 4 |
| 9 |
=1
| 4 |
| 9 |
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