题目内容
脱式计算?
861×(24+51)? | 2000-45×24+96? | 300+88×12-1048 | 1000-(763+75×3)? |
解:(1)861×(24+51),
=861×75,
=64575;
(2)2000-45×24+96,
=2000-1080+96,
=920+96,
=1016;
(3)300+88×12-1048,
=300+1056-1048,
=1356-1048,
=308;
(4)1000-(763+75×3),
=1000-(763+225),
=1000-988,
12;
分析:按整数四则混合运算顺序进行计算.
点评:对整数四则混合运算顺序进行考查.
=861×75,
=64575;
(2)2000-45×24+96,
=2000-1080+96,
=920+96,
=1016;
(3)300+88×12-1048,
=300+1056-1048,
=1356-1048,
=308;
(4)1000-(763+75×3),
=1000-(763+225),
=1000-988,
12;
分析:按整数四则混合运算顺序进行计算.
点评:对整数四则混合运算顺序进行考查.
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