题目内容
计算下面各题.
(1)62.5%×(8.3-6÷20)
(2)
÷[
×(
+
)].
(1)62.5%×(8.3-6÷20)
(2)
11 |
20 |
1 |
2 |
2 |
3 |
4 |
5 |
分析:(1)行算括号里面的除法,再算减,最后算乘,
(2)先做小括号里的,再算中括号,最后算除.
(2)先做小括号里的,再算中括号,最后算除.
解答:解:(1)62.5%×(8.3-6÷20)
=0.625×(8.3-0.3),
=0.625×8,
=5;
(2)
÷[
×(
+
)],
=
÷[
×
],
=
÷
,
=
.
=0.625×(8.3-0.3),
=0.625×8,
=5;
(2)
11 |
20 |
1 |
2 |
2 |
3 |
4 |
5 |
=
11 |
20 |
1 |
2 |
22 |
15 |
=
11 |
20 |
11 |
15 |
=
3 |
4 |
点评:本题综合考查了学生根据四则运算的计算顺序认真计算的能力.
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