我很聪明,会用简便方法计算.
376+28+172+12443000÷8÷12599×38+3825×1048×(29×125)688-534+112-166156×101-156164-83-1726×148-48×26.
我很聪明,会用简便方法计算.376+28+172+12443000÷8÷12599×38+3825×1048×(29×125)688-534+112-166156×1
答案:2 悬赏:0 手机版
解决时间 2021-01-03 14:58
- 提问者网友:嗝是迷路的屁
- 2021-01-03 08:57
最佳答案
- 五星知识达人网友:酒者煙囻
- 2021-01-03 09:58
解:(1)376+28+172+124,
=(376+124)+(28+172),
=500+200,
=700;
(2)43000÷8÷125,
=43000÷(8×125),
=43000÷1000,
=43;
(3)99×38+38,
=38×(99+1),
=38×100,
=3800;
(4)25×104,
=25×(100+4),
=25×100+25×4,
=2500+100,
=2600;
(5)8×(29×125),
=8×125×29,
=1000×29,
=29000;
(6)688-534+112-166,
=(688+112)-(534+166),
=800-700,
=100;
(7)156×101-156,
=156×(101-1),
=156×100,
=15600;
(8)164-83-17,
=164-(83+17),
=164-100,
=64;
(9)26×148-48×26,
=26×(148-48),
=26×100,
=2600.解析分析:(1)运用加法交换律和加法结合律简算;
(2)根据除法的性质简算;
(3)(7)(9)运用乘法分配律简算;
(4)先把104分解成(100+4)再运用乘法分配律简算;
(5)运用乘法交换律和结合律简算;
(6)运用加法结合律和减法的减法的性质简算;
(8)根据连续减去两个数,等于减去这两个数的和简算.
点评:完成本题要注意分析式中数据,运用合适的简便方法计算.
=(376+124)+(28+172),
=500+200,
=700;
(2)43000÷8÷125,
=43000÷(8×125),
=43000÷1000,
=43;
(3)99×38+38,
=38×(99+1),
=38×100,
=3800;
(4)25×104,
=25×(100+4),
=25×100+25×4,
=2500+100,
=2600;
(5)8×(29×125),
=8×125×29,
=1000×29,
=29000;
(6)688-534+112-166,
=(688+112)-(534+166),
=800-700,
=100;
(7)156×101-156,
=156×(101-1),
=156×100,
=15600;
(8)164-83-17,
=164-(83+17),
=164-100,
=64;
(9)26×148-48×26,
=26×(148-48),
=26×100,
=2600.解析分析:(1)运用加法交换律和加法结合律简算;
(2)根据除法的性质简算;
(3)(7)(9)运用乘法分配律简算;
(4)先把104分解成(100+4)再运用乘法分配律简算;
(5)运用乘法交换律和结合律简算;
(6)运用加法结合律和减法的减法的性质简算;
(8)根据连续减去两个数,等于减去这两个数的和简算.
点评:完成本题要注意分析式中数据,运用合适的简便方法计算.
全部回答
- 1楼网友:洎扰庸人
- 2021-01-03 11:34
这个问题我还想问问老师呢
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