2.5×1.4-2.5
2.5×1.4-2.5 -
解:2.5×1.4-2.5等于(1 )∵已知需求出2.5×1.4-2.5等于多少X × Y - X = X × (Y - 1)∴2.5 × 1.4 - 2.5 = 2.5 × (1.4 - 1) 2.5 × 0.4 = 1 答:2.5×1.4-2.5等于1
2.5×1.4-2.5 =2.5×1.4 - 2.5×1 =2.5×(1.4-1)=2.5×0.4 =1
解:2.5×1.4-2.5等于(1 )∵已知需求出2.5×1.4-2.5等于多少X × Y - X = X × (Y - 1)∴2.5 × 1.4 - 2.5 = 2.5 × (1.4 - 1) 2.5 × 0.4 = 1 答:2.5×1.4-2.5等于1
2.5×1.4-2.5 =2.5×1.4 - 2.5×1 =2.5×(1.4-1)=2.5×0.4 =1
=2.5x(1+0.4)-2.5 =2.5x1+2.5x0.4-2.5 =2.5+1-2.5 =1。
1.4x2.5-2.5 =2.5x(1.4-1)=2.5x1.3 =2.5x(1+0.3)=3.25 如有帮助请采纳,如对本题有疑问可追问,Good luck!
1.4×2.5-2.5的简便计算? -
1.4×2.5-2.5 =2.5×(1.4-1)=2.5×0.4 =1
2.5*1.4-2.5*x=2 3.5-2.5*x=2 2.5*x=1.5 X=0.6
2.5(1.4-x)=2解方程,求详细过程,要理由。 -
2.5*1.4-2.5*x=2 3.5-2.5*x=2 2.5*x=1.5 X=0.6
二点5×1点4-2点4×0点五,那么这道题可以简便运算8.5化成0.5或0.5或0.5,利用乘法分配律进行简便计算,
2.5厘米×1.4厘米是多大 -
底是2.5厘米,高是1.4厘米的三角形面积是:2.5*1.4/2=1.75cm^2,如果底不变,高扩大到原来的1.5倍,它的面积是:2.5*1.4*1.5/2=1.75*1.5= cm^2
=2.5×(1+0.4)-2.4÷2 =2.5-1.2+2.5×0.4 =1.3+1 =2.3