题目内容
计算,能简算的要简算.
| (1)32×0.25×1.25 | (2)38×
| (3)8×
| ||||||||||
(4)
| (5)4.27÷0.7×1.3 | (6)
|
解(1)32×0.25×1.25
=(4×8)×0.25×1.25
=(4×0.25)×(8×1.25)
=1×10
=10
(2))38×
=(37+1)×
=37×
+1×
=3+
=3
(3)8×
+
=
×(8+1)
=
×9
=2
(4)
÷
×14
=
×14
=16
(5)4.27÷0.7×1.3
=6.1×1.3
=7.93
(6)
÷9+
×
×
+
×
=
×(
+
)
=
×1
=
=(4×8)×0.25×1.25
=(4×0.25)×(8×1.25)
=1×10
=10
(2))38×
| 3 |
| 37 |
=(37+1)×
| 3 |
| 37 |
=37×
| 3 |
| 37 |
| 3 |
| 37 |
=3+
| 3 |
| 37 |
=3
| 3 |
| 37 |
(3)8×
| 2 |
| 9 |
| 2 |
| 9 |
=
| 2 |
| 9 |
=
| 2 |
| 9 |
=2
(4)
| 4 |
| 5 |
| 7 |
| 10 |
=
| 8 |
| 7 |
=16
(5)4.27÷0.7×1.3
=6.1×1.3
=7.93
(6)
| 6 |
| 25 |
| 6 |
| 25 |
| 8 |
| 9 |
| 6 |
| 25 |
| 1 |
| 9 |
| 6 |
| 25 |
| 8 |
| 9 |
=
| 6 |
| 25 |
| 1 |
| 9 |
| 8 |
| 9 |
=
| 6 |
| 25 |
=
| 6 |
| 25 |
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