题目内容
脱式计算
(1)
+(1-
)×
(2)(
÷3-0.1)×(1-
)
(1)
8 |
9 |
3 |
4 |
4 |
9 |
3 |
4 |
2 |
3 |
分析:(1)先算减法,再算乘法,最后算加法;
(2)先算小括号里面的除法,再算小括号里面的减法,最后算乘法.
(2)先算小括号里面的除法,再算小括号里面的减法,最后算乘法.
解答:解:
(1)
+(1-
)×
,
=
+
×
,
=
+
,
=1;
(2)(
÷3-0.1)×(1-
),
=(
-0.1)×(1-
),
=0.15×
,
=0.05.
(1)
8 |
9 |
3 |
4 |
4 |
9 |
=
8 |
9 |
1 |
4 |
4 |
9 |
=
8 |
9 |
1 |
9 |
=1;
(2)(
3 |
4 |
2 |
3 |
=(
1 |
4 |
2 |
3 |
=0.15×
1 |
3 |
=0.05.
点评:考查了四则混合运算.注意运算顺序和运算法则,然后再进行计算.
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