6.4*12.5用简便方法怎么算
6.4*12.5=4*1.6*25*0.5=0.8*100=80
12.5乘6.4的简便运算?
=(6+6.5)×(6+0.4)=6×(6.5+0.4)=6×(7-0.1)=6×7-6×0.1 =42-0.6 =41.4
12.5乘以6.4的简便计算
回答:12.5乘以8再乘以0.8
12.5X6.4如何简便计算?
回答:12.5*(6+0.4)=12.5*6+12.5*0.4=75+5=80
12.5×6.4的简便算法怎么算
12.5×6.4的简便算法怎么算12.5 = 25 / 26.4 = 4 * 16 / 1012.5 * 6.4 = 4 * 25 * 16 / 2 / 10 = 800 / 10 = 80或者6.4 = 8 * 0.812.5 * 6.4 = 12.5 * 8 * 0.8 = 100 * 0.8 = 80
12.5乘6.4简便运算的答案?
12.5*6.4=12.5*8*0.8=100*0.8=80
0.45乘2.5乘6.4乘12.5的简便方法
简便方法 0.45×2.5×6.4×12.5 =(0.45×2)×(2.5×4)×(12.5×0.8)=0.9×10×10 =90
12.5×6.4,,简便方法。立等式。
(12.5×8)×0.8
12.5乘以6.4的简便运算怎样算?
12.5×6.4x2.5简便方法如下:2.5×6.4×12.5 =(2.5×0.8)×(8×12.5)=2×100 =200 小学数学简便方法归纳:1、提取公因式:这个方法实际上是运用了乘法分配律,将相同因数提取出来,考试中往往剩下的项相加减,会出现一个整数。2、借来借去法:看到名字,就知道这个方法的含义。用此...
o.25x6.4x12.5用简便方法计算
用简便方法计算 0.25x6.4x12.5 =(0.25×4)×(1.6×12.5)=1×20 =20