题目内容
计算
(1)[(0.05+
)÷0.25-40%]×
(2)[4
-(0.5+
)÷
]×0.125
(3)6.4×1.3+1÷
+
×
(4)7.4×
+125%×2.5+
÷10.
(1)[(0.05+
| 1 |
| 4 |
| 1 |
| 8 |
(2)[4
| 1 |
| 2 |
| 1 |
| 3 |
| 5 |
| 27 |
(3)6.4×1.3+1÷
| 10 |
| 13 |
| 13 |
| 10 |
| 13 |
| 5 |
(4)7.4×
| 5 |
| 4 |
| 5 |
| 4 |
(1)[(0.05+
)÷0.25-40%]×
=[(0.05+0.25)÷0.25-40%]×
,
=[0.3÷0.25-40%]×
,
=[1.2-0.4]×
,
=0.8×
,
=0.1;
(2)[4
-(0.5+
)÷
]×0.125
=[4
-(
+
)×
]×0.125,
=[4
-
×
]×0.125,
=[4
-4
]×0.125,
=0×0.125,
=0;
(3)6.4×1.3+1÷
+
×
=6.4×1.3+1×1.3+1.3×2.6,
=(6.4+1+2.6)×1.3,
=10×1.3,
=13;
(4)7.4×
+125%×2.5+
÷10
=7.4×1.25+1.25×2.5+1.25×0.1,
=(7.4+2.5+0.1)×1.25,
=10×1.25,
=12.5.
| 1 |
| 4 |
| 1 |
| 8 |
=[(0.05+0.25)÷0.25-40%]×
| 1 |
| 8 |
=[0.3÷0.25-40%]×
| 1 |
| 8 |
=[1.2-0.4]×
| 1 |
| 8 |
=0.8×
| 1 |
| 8 |
=0.1;
(2)[4
| 1 |
| 2 |
| 1 |
| 3 |
| 5 |
| 27 |
=[4
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 27 |
| 5 |
=[4
| 1 |
| 2 |
| 5 |
| 6 |
| 27 |
| 5 |
=[4
| 1 |
| 2 |
| 1 |
| 2 |
=0×0.125,
=0;
(3)6.4×1.3+1÷
| 10 |
| 13 |
| 13 |
| 10 |
| 13 |
| 5 |
=6.4×1.3+1×1.3+1.3×2.6,
=(6.4+1+2.6)×1.3,
=10×1.3,
=13;
(4)7.4×
| 5 |
| 4 |
| 5 |
| 4 |
=7.4×1.25+1.25×2.5+1.25×0.1,
=(7.4+2.5+0.1)×1.25,
=10×1.25,
=12.5.
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