36×72+36×27+36 125×32×25 4.64-(0.64+3.62) 21÷9+22÷9+23÷9+24÷

问题描述:

36×72+36×27+36 125×32×25 4.64-(0.64+3.62)
21÷9+22÷9+23÷9+24÷9 199999.9+19999.8+1999.9+199.8+19.9+0.7.
1个回答 分类:数学 2014-11-19

问题解答:

我来补答
(1)36×72+36×27+36,
=36×(72+27+1),
=36×100,
=3600;
(2)125×32×25,
=(125×8)×(4×25),
=1000×100,
=100000;
(3)4.64-(0.64+3.62),
=4.64-0.64-3.62,
=4-3.62,
=0.38;
(4)21÷9+22÷9+23÷9+24÷9,
=
21
9+
22
9+
23
9+
24
9,
=
90
9,
=10;
(5)199999.9+19999.8+1999.9+199.8+19.9+0.7.
=(199999.9+0.1)+(19999.8+0.2)+(199.8+0.2)+(19.9+0.1)+0.1,
=200000+20000+200+20+0.1,
=220220.1.
 
 
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