计算下面各题.(能简算的要简算)1-14-0.75 100-70×25-2 75.4×16-75.4×6
计算下面各题.(能简算的要简算)1-14-0.75100-70×25-275.4×16-75.4×64×67÷473600÷254÷12×(58-14)...
计算下面各题.(能简算的要简算)1-14-0.75 100-70×25-2 75.4×16-75.4×6 4×67÷47 3600÷25 4÷12×(58-14)
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(1)1-
-0.75,
=1-(0.25+0.75),
=1-1,
=0;
(2)100-70×
-2,
=100-28-2,
=100-(28+2),
=100-30,
=70;
(3)75.4×16-75.4×6,
=75.4×(16-6),
=75.4×10,
=754;
(4)4×
÷
,
=4×
×
,
=6;
(5)3600÷25,
=(3600×4)÷(25×4),
=14400÷100,
=144;
(6)4÷
×(
-
),
=4÷
×
,
=8×
,
=3.
1 |
4 |
=1-(0.25+0.75),
=1-1,
=0;
(2)100-70×
2 |
5 |
=100-28-2,
=100-(28+2),
=100-30,
=70;
(3)75.4×16-75.4×6,
=75.4×(16-6),
=75.4×10,
=754;
(4)4×
6 |
7 |
4 |
7 |
=4×
6 |
7 |
7 |
4 |
=6;
(5)3600÷25,
=(3600×4)÷(25×4),
=14400÷100,
=144;
(6)4÷
1 |
2 |
5 |
8 |
1 |
4 |
=4÷
1 |
2 |
3 |
8 |
=8×
3 |
8 |
=3.
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