题目内容

看谁算得又准又快．
13×（2+
7
13
）=		 341-103= 24.06+0.4=
3
8
-
1
3
=		 （
5
6
-
1
5
）×30=
4
5
×25=
1
12
×6=		 2.8×25+12×2.5= 12.5×32×2.5=
3
5
×1=
分析：根据分数、小数加减及乘除法的计算法则进行计算即可．
解答：
解：13×（2+
7
13
）=33		 341-103=238 24.06+0.4=24.46
3
8
-
1
3
=
1
24
 （
5
6
-
1
5
）×30=19
4
5
×25=20
1
12
×6=
1
2
 2.8×25+12×2.5=100 12.5×32×2.5=1000
3
5
×1=
3
5
点评：本题主要考查了分数、小数加减乘除法的计算法则的运用．
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1
．

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