题目内容
(2013?龙海市模拟)脱式计算:
6760÷13+17×25 | 4.82-5.2÷0.8×0.6 | (
|
(
|
分析:第一、二、三题按分数、整数四则混合运算顺序计算,第三题应用乘法分配律简便计算.
解答:解:(1)6760÷13+17×25
=520+425,
=945;
(2)4.82-5.2÷0.8×0.6,
=4.82-6.5×0.6,
=4.82-3.9,
=0.92;
(3)(
+2
)÷(2+3
),
=(
+
)÷
,
=
×
,
=
;
(4)(
×10.68+8.52×
)÷1
,
=
×(10.68+8.52)÷
,
=
×19.2×
,
=10.
=520+425,
=945;
(2)4.82-5.2÷0.8×0.6,
=4.82-6.5×0.6,
=4.82-3.9,
=0.92;
(3)(
1 |
3 |
1 |
2 |
2 |
3 |
=(
2 |
6 |
15 |
6 |
17 |
3 |
=
17 |
6 |
3 |
17 |
=
1 |
2 |
(4)(
5 |
6 |
5 |
6 |
3 |
5 |
=
5 |
6 |
8 |
5 |
=
5 |
6 |
5 |
8 |
=10.
点评:此题主要考查分数、整数、小数的四则混合运算的运算顺序和应用运算定律进行简便计算.
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