(25-2.5)x4.1和12.5x0.7+12.5怎么简算
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/11/09 09:46:22
(25-2.5)x4.1和12.5x0.7+12.5怎么简算
还有
(2.82x7+2.82)x1.25
(6-5.96)x2.5+0.83
都是怎么简算的
还有
(2.82x7+2.82)x1.25
(6-5.96)x2.5+0.83
都是怎么简算的
(25-2.5)x4.1
=(25-2.5)x(4+0.1)
=(25-2.5)x4+(25-2.5)x0.1
=100-10+2.5-0.25
=90+2.25
=92.25
{(25-2.5)x4.1中,将4.1拆为(4+0.1),再把它们各项乘出来(即用4分别乘25和2.5,再相减,然后加上0.1分别乘25和2.5后的和}
12.5x0.7+12.5
=12.5x0.7+1.25-1.25+12.5
=12.5x(0.7+0.1)-1.25+12.5
=10-1.25+12.5
=21.25
(2.82x7+2.82)x1.25
=2.82x(7+1)x1.25
=2.82x(8x1.25)
=2.82x10
=28.2
(6-5.96)x2.5+0.83
=0.04x2.5+0.83
=0.1+0.83
=0.93
=(25-2.5)x(4+0.1)
=(25-2.5)x4+(25-2.5)x0.1
=100-10+2.5-0.25
=90+2.25
=92.25
{(25-2.5)x4.1中,将4.1拆为(4+0.1),再把它们各项乘出来(即用4分别乘25和2.5,再相减,然后加上0.1分别乘25和2.5后的和}
12.5x0.7+12.5
=12.5x0.7+1.25-1.25+12.5
=12.5x(0.7+0.1)-1.25+12.5
=10-1.25+12.5
=21.25
(2.82x7+2.82)x1.25
=2.82x(7+1)x1.25
=2.82x(8x1.25)
=2.82x10
=28.2
(6-5.96)x2.5+0.83
=0.04x2.5+0.83
=0.1+0.83
=0.93
求12.5x0.25x3.2和12.5x4.5+4.5x12.5+12.5的简便计算 快明天就没用了!
25.25x0.64x4/0.64 怎么简便
0.125x4.8x0.25 简便计算
25.25x0.65x4除以0.65的简便方法怎么算
1/8x4/11+19/11x0.125-1/8怎么简算呢?
数学题解答用简便方法计算下面各题.2.5x4.4 32x0.25x12.5 3.64x0.8+6.36x0.8-3.8
12.5x0.38+1.25x4.2+0.125x20如何用简便方法计算
21.36÷0.8-12.9 可以简算就简算 0.65x201 2.5x4.25x0.8
小学计算题,求大师解25x32x1.25 8.5x4.7+53x0.8581除于14+17x14分之1 5-8分之3x3
巧思妙算 0.75x4.3+2.5x0.43
用简便方法算3.75x4.8+62.5x0.48
两道简便运算7.2x4.6+46x0.289.8x3.6+7.2x0.1