题目内容
| 递等计算(能简便的要简便) 420-375÷25; | 12÷1.5+1.5×0.08; | ||||||||
0.25×
| 1
| ||||||||
| 3.4÷[(0.2+
|
(1)420-375÷25
=420-15
=405;
(2)12÷1.5+1.5×0.08
=8+0.12
=8.12;
(3)0.25×
×32×1
×1.25
=0.25×
×(4×8)×1
×1.25
=(0.25×4)×(
×1
)×(8×1.25)
=1×
×10
=5;
(4)1
÷(5-3.9×
)
=1
÷(5-2.6)
=1
÷2.4
=
;
(5)
×101-
=
×(101-1)
=
×100
=60;
(6)3.4÷[(0.2+
)×1
]
=3.4÷[
×1
]
=3.4÷
=5.1.
=420-15
=405;
(2)12÷1.5+1.5×0.08
=8+0.12
=8.12;
(3)0.25×
| 3 |
| 7 |
| 1 |
| 6 |
=0.25×
| 3 |
| 7 |
| 1 |
| 6 |
=(0.25×4)×(
| 3 |
| 7 |
| 1 |
| 6 |
=1×
| 1 |
| 2 |
=5;
(4)1
| 5 |
| 7 |
| 2 |
| 3 |
=1
| 5 |
| 7 |
=1
| 5 |
| 7 |
=
| 5 |
| 7 |
(5)
| 3 |
| 5 |
| 3 |
| 5 |
=
| 3 |
| 5 |
=
| 3 |
| 5 |
=60;
(6)3.4÷[(0.2+
| 1 |
| 3 |
| 1 |
| 4 |
=3.4÷[
| 8 |
| 15 |
| 1 |
| 4 |
=3.4÷
| 2 |
| 3 |
=5.1.
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