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脱式计算.100÷25+50×151.5÷3-1.2×0.4615-(35+2.4×13)÷121.2+[225÷(2-2.4×23)].
题目详情
脱式计算.
100÷25+50×15
1.5÷3-1.2×0.4
6
-(
+2.4×
)÷
1.2+[2
÷(2-2.4×
)].
100÷25+50×15
1.5÷3-1.2×0.4
6
1 |
5 |
3 |
5 |
1 |
3 |
1 |
2 |
1.2+[2
2 |
5 |
2 |
3 |
▼优质解答
答案和解析
(1)100÷25+50×15
=4+750
=754;
(2)1.5÷3-1.2×0.4
=0.5-0.48
=0.02;
(3)6
-(
+2.4×
)÷
=6
-(
+0.8)÷
=6
-1.4÷
=6
-2.8
=3.4;
(4)1.2+[2
÷(2-2.4×
)]
=1.2+[2
÷(2-1.6)]
=1.2+[2
÷0.4]
=1.2+6
=7.2.
=4+750
=754;
(2)1.5÷3-1.2×0.4
=0.5-0.48
=0.02;
(3)6
1 |
5 |
3 |
5 |
1 |
3 |
1 |
2 |
=6
1 |
5 |
3 |
5 |
1 |
2 |
=6
1 |
5 |
1 |
2 |
=6
1 |
5 |
=3.4;
(4)1.2+[2
2 |
5 |
2 |
3 |
=1.2+[2
2 |
5 |
=1.2+[2
2 |
5 |
=1.2+6
=7.2.
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