简便计算.①111111÷1111×3333=------②6.25×0.16+2.64×0.0625+5.2×6.25

问题描述:

简便计算.
①111111÷1111×3333=______
②6.25×0.16+2.64×0.0625+5.2×6.25=______
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1个回答 分类:数学 2014-11-23

问题解答:

我来补答
①111111÷1111×3333,
=111111×3333÷1111,
=111111×(3333÷1111),
=111111×3,
=333333;
②6.25×0.16+264×0.0625+5.2×6.25,
=6.25×0.16+2.64×6.25+5.2×6.25,
=6.25×(0.16+2.64+5.2),
=6.25×8,
=(6+0.25)×8,
=48+2,
=50;

1
2-
1
3+
1
4-
1
5+
1
6-
1
12,
=(1-
1
2)-
1
3+
1
4-
1
5+(
1
2-
1
3)-(
1
3-
1
4),
=1-
1
2+
1
2-(
1
3+
1
3+
1
3)+(
1
4+
1
4-
1
5),
=
1
4+
1
4-
1
5,
=
1
2-
1
5,
=
3
10.
故答案为:333333,50,
3
10.
 
 
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