题目内容
混合运算
3.14×42+27.3×
|
18.84×100-12.5×32. |
分析:(1)先算乘方,再算乘法,最后算加法;
(2)先算乘方,再算乘法,最后算减法.
(2)先算乘方,再算乘法,最后算减法.
解答:解:
(1)3.14×42+27.3×
,
=3.14×16+27.3×
,
=50.24+9.1,
=59.34;
(2)18.84×100-12.5×32,
=18.84×100-12.5×9,
=1884-112.5,
=1771.5.
(1)3.14×42+27.3×
1 |
3 |
=3.14×16+27.3×
1 |
3 |
=50.24+9.1,
=59.34;
(2)18.84×100-12.5×32,
=18.84×100-12.5×9,
=1884-112.5,
=1771.5.
点评:四则运算,先弄清运算顺序,然后再进一步计算,能简算的要简算.
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混合运算
3.14×42+27.3× | 18.84×100-12.5×32. |