题目内容
| 1 |
| 7 |
| 1 |
| 7 |
6-(
| 1 |
| 7 |
| 3 |
| 4 |
| 1 |
| 4 |
| 1 |
| 88 |
[1-(
| 3 |
| 4 |
| 1 |
| 12 |
| 3 |
| 2 |
99%+91×(
| 2 |
| 13 |
| 1 |
| 7 |
分析:(1)(2)(4)根据四则混合运算的运算顺序计算即可:先算 乘除,再算加减,有括号的在先算括号里面的;
(3)(5)可根据乘法分配律计算.
(3)(5)可根据乘法分配律计算.
解答:解:(1)
÷7+7÷
=
+49,
=49
;
(2)6-(
÷2+3)
=6-(
+3),
=6-3
,
=2
;
(3)
×88+
÷
=
×88+
,
=(
+
)×88,
=1×88,
=88;
(4)[1-(
+
)]×
=[1-
]×
,
=
×
,
=
;
(5)99%+91×(
-
)
=99%+91×
-91×
,
=0.99+14-13,
=1.99.
| 1 |
| 7 |
| 1 |
| 7 |
=
| 1 |
| 49 |
=49
| 1 |
| 49 |
(2)6-(
| 1 |
| 7 |
=6-(
| 1 |
| 14 |
=6-3
| 1 |
| 14 |
=2
| 13 |
| 14 |
(3)
| 3 |
| 4 |
| 1 |
| 4 |
| 1 |
| 88 |
=
| 3 |
| 4 |
| 1 |
| 4 |
=(
| 3 |
| 4 |
| 1 |
| 4 |
=1×88,
=88;
(4)[1-(
| 3 |
| 4 |
| 1 |
| 12 |
| 3 |
| 2 |
=[1-
| 5 |
| 6 |
| 3 |
| 2 |
=
| 1 |
| 6 |
| 3 |
| 2 |
=
| 1 |
| 4 |
(5)99%+91×(
| 2 |
| 13 |
| 1 |
| 7 |
=99%+91×
| 2 |
| 13 |
| 1 |
| 7 |
=0.99+14-13,
=1.99.
点评:完成本题要细心分析式中据的特点,然后运用合适的方法计算.
练习册系列答案
相关题目