作业帮 > 数学 > 作业

怎样简便就怎样算.12.75-(6.57+2.75)4.8÷0.24÷25.8-1.29+4.2-7.71 &

来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/05/14 17:12:00
怎样简便就怎样算.
12.75-(6.57+2.75)
4.8÷0.24÷2
5.8-1.29+4.2-7.71    
0.25×1.25×32.
(1)12.75-(6.57+2.75)
=12.75-2.75-6.57,
=10-6.57,
=3.43;
(2)4.8÷0.24÷2
=4.8÷2÷0.24,
=2.4÷0.24,
=10;
(3)5.8-1.29+4.2-7.71  
=(5.8+4.2)-(1.29+7.71),
=10-9,
=1;
(4)0.25×1.25×32
=0.25×4×(1.25×8),
=1×10,
=10.