8xx4简便计算
简便计算 -
（8X4）X2·5X1·25 ＝8X1·25X4X2·5 ＝10X10 ＝100
=25x4x38(乘法交换律)=(25ⅹ4)x38(乘法结合律)=100ⅹ38 =3800。
（8X4）X2·5X1·25 ＝8X1·25X4X2·5 ＝10X10 ＝100
=25x4x38(乘法交换律)=(25ⅹ4)x38(乘法结合律)=100ⅹ38 =3800。
=9.32 1，2X2，5十0，8X2，5 =(1.2+0.8)x2.5 =2x2.5 =5
8x(12.5+0.25)x4 =8x12.5x4+4x0.25x8 =400+8 =408
8x48x82简便? -
8x48x82=31488
8x(125十25)x4简便方法：8×125×4+8×25×4 =（8×125）×4+（25×4）×8 =1000×4+100×8 =4000+800 =4800
800➗25x4怎么简便计算? -
=8×100÷25×4 =8×4×4 =32×4 =（30+2）×4 =120+8 =128
简便计算：16x25 =16x5x5 =80x5 =400 16x125 =4x4x125 =125x4x4 =500x4 =2000 28x25 =28x5x5 =140x5 =700 32x125 =4x8x125 =125x4x8 =500x8 =4000 25x44 =5x5x44 =44x5x5 =220x5 =1100 125x18 =125x2x9 =250x9 =2250 希望你能满意。
用简便方法计算8ⅹ(12.5 25)X4怎么算? -
用简便方法计算：8ⅹ(12.5+25)X4 =8x12.5x4+25x4x8 =100x4+100x8 =400+800 =1200
回答：125÷25x8x4 =5x8x4 =160