34x1.25 2.6x12.5 0.2x125的简便计算?
作者&投稿:包省 (若有异议请与网页底部的电邮联系)
34x1.25+2.6x12.5+0.2x125
=34x1.25+26x1.25+20x1.25
=(34+26+20)x1.25
=80x1.25
=100
应该是34×1.25+2.6×12.5+0.2×125=34×1.25+26×1.25+20×1.25=1.25×(34+26+20)=1.25×80=100
这个就是把第一项变成12.5×3.4。把第三项变成12点5×2。你这每一项之间应该有加号的吧?拟题目上面都没出现,我猜应该是加号,然后把12.5提到前面去括号里面就出现了三点4+2点6+2。结果就是得出八。最后,8×12点五。最后结果就是100。
蹉屈培瑞: 计算过程如下: 3.2x6.5x1.25 =4x6.5x(0.8x1.25) =26x1 =26
丰满区19776197402: 1.4x8.5+85x0.06 - 7.4和34x1.25+6.6x12.5简便运算怎么算. - ?
蹉屈培瑞: 1.4x8.5+85x0.06-7.4 =1.4x8.5+8.5x0.6-7.4 =(1.4+0.6)x8.5-7.4 =2x8.5-7.4 =17-7.4 =9.634x1.25+6.6x12.5 =3.4x12.5+6.6x12.5 =(3.4+6.6)x12.5 =10x12.5 =125
丰满区19776197402: 谁知道下面的计算题怎么简便计算啊??
蹉屈培瑞: 1.25X8X0.4X2.5=1 0.34X12.5+0.125X66 =34X0.125+0.125X66 =(34+66)X0.125 =12.5
丰满区19776197402: 1.84x2.6 0.26x1.16的简便计算 - ?
蹉屈培瑞: 1.84x2.6+ 0.26x11.6=1.84X2.6+2.6X1.16=2.6X (1.84+1.16)=2.6X 3=7.8 如果是1.84x2.6 0.26x1.16 ,没法算.
丰满区19776197402: 3.4x+2.6x=12解方程 - ?
蹉屈培瑞: 3.4x+2.6x=126x=12 x=2
丰满区19776197402: 3.6x一x=3.25请问x等于多少 - ?
蹉屈培瑞: 解:3.6x-x=3.25 2.6x=3.25 x=3.25÷2.6 x=1.25
丰满区19776197402: 3.8*2.6*0.25如何进行简便计算 - ?
蹉屈培瑞: (1) 3.8*2.6*0.25 =(1.9x2)x(1.3x2)x0.25 =1.9x1.3x(4x0.25) =1.9x1.3 =(1.9+0.1)x1.3-0.13 =2.6-0.13 =2.47 (2) 3.8*2.6*0.25 =(3.8+0.2)x2.6x0.25-0.2x2.6x0.25 =2.6x4x0.25-0.13x4x0.25 =2.47
丰满区19776197402: 1.35*2.6*5简算 - ?
蹉屈培瑞: 1.35*2.6*5简算=1.35x(2.6x5)=1.35x13=1.35x(10+3)=1.35x10+1.35x3=13.5+4.05=17.55
丰满区19776197402: 用方程解,五年级的1.4x+2.6x=120 - ?
蹉屈培瑞:1.4x+2.6x=120 4x=120 x=30
丰满区19776197402: 4.3+2.6x2.5简便计算 - ?
蹉屈培瑞: 4.3+2.6x2.5=4.3+2.6x5x0.5=4.3+13x0.5=4.3+6.5=10.8