题目内容
①[(9
-7
)÷2
]÷1
②0.52×2
+7
×0.52
③(1
-
)×(2+
)÷1
④[(4.25-3
)×2.4+10÷6
]÷0.13
⑤24×(
+
)÷(6.375-5
)
⑥(15
÷3-2
×1
)÷1
.
| 1 |
| 5 |
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 5 |
②0.52×2
| 4 |
| 9 |
| 5 |
| 9 |
③(1
| 2 |
| 5 |
| 4 |
| 5 |
| 2 |
| 3 |
| 3 |
| 5 |
④[(4.25-3
| 1 |
| 8 |
| 1 |
| 4 |
⑤24×(
| 7 |
| 12 |
| 5 |
| 6 |
| 3 |
| 8 |
⑥(15
| 3 |
| 5 |
| 2 |
| 3 |
| 7 |
| 8 |
| 3 |
| 8 |
分析:完成本题根据四则混合运算法则计算即可,能简算的要据运算定律简算.
解答:解:(1)[(9
-7
)÷2
]÷1
=[
÷
]÷
;
=
×
;
=
;
(2)0.52×2
+7
×0.52
=(2
+7
)×0.52;
=10×0.52;
=5.2;
(3)(1
-
)×(2+
)÷1
=
×(
×
);
=
×
;
=1;
(4)[(4.25-3
)×2.4+10÷6
]÷0.13
=[(4
-3
)×2
+10÷
]÷
;
=[
×
+10×
]÷
;
=[
+
]÷
;
=
×
;
=33
;
(5)24×(
+
)÷(6.375-5
)
=24×
÷(6
- 5
);
=34×1;
=34;
(6)(15
÷3-2
×1
)÷1
=(
×
-
×
)÷
;
=(
-5)×
;
=
×
;
=
.
| 1 |
| 5 |
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 5 |
=[
| 17 |
| 10 |
| 11 |
| 4 |
| 6 |
| 5 |
=
| 34 |
| 55 |
| 5 |
| 6 |
=
| 17 |
| 33 |
(2)0.52×2
| 4 |
| 9 |
| 5 |
| 9 |
=(2
| 4 |
| 9 |
| 5 |
| 9 |
=10×0.52;
=5.2;
(3)(1
| 2 |
| 5 |
| 4 |
| 5 |
| 2 |
| 3 |
| 3 |
| 5 |
=
| 3 |
| 5 |
| 8 |
| 3 |
| 5 |
| 8 |
=
| 3 |
| 5 |
| 5 |
| 3 |
=1;
(4)[(4.25-3
| 1 |
| 8 |
| 1 |
| 4 |
=[(4
| 1 |
| 4 |
| 1 |
| 8 |
| 2 |
| 5 |
| 25 |
| 4 |
| 13 |
| 100 |
=[
| 9 |
| 8 |
| 12 |
| 5 |
| 4 |
| 25 |
| 13 |
| 100 |
=[
| 27 |
| 10 |
| 8 |
| 5 |
| 13 |
| 100 |
=
| 43 |
| 10 |
| 100 |
| 13 |
=33
| 1 |
| 13 |
(5)24×(
| 7 |
| 12 |
| 5 |
| 6 |
| 3 |
| 8 |
=24×
| 17 |
| 12 |
| 3 |
| 8 |
| 3 |
| 8 |
=34×1;
=34;
(6)(15
| 3 |
| 5 |
| 2 |
| 3 |
| 7 |
| 8 |
| 3 |
| 8 |
=(
| 78 |
| 5 |
| 1 |
| 3 |
| 8 |
| 3 |
| 15 |
| 8 |
| 11 |
| 8 |
=(
| 26 |
| 5 |
| 8 |
| 11 |
=
| 1 |
| 5 |
| 8 |
| 11 |
=
| 8 |
| 55 |
点评:完成本题要认真分析式中数据,特别要注意分数、小数之间的转化.
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