68x8768x28简算怎么做
...3)12x340+66x120 (4)25x41 (5)28x18-8x28 (6)63x43+57x63_百度知 ...
28*18-8*28 =28*（18-8）28*10 =280 63*43+57*63 =63*（43+57）63*100 =6300
=98x28.6+(0.8x2.5)x28.6 =98x28.6+2x28.6 =(98+2)x28.6 =100x28.6 =2860
28*18-8*28 =28*（18-8）28*10 =280 63*43+57*63 =63*（43+57）63*100 =6300
=98x28.6+(0.8x2.5)x28.6 =98x28.6+2x28.6 =(98+2)x28.6 =100x28.6 =2860
8x(25x7)=(4X25)x(2x7)=100x14 =1400
=8x1.25x3.56 =10x3.56 =35.6
12x30+88x38+8x12怎么简算 -
（12*30+12*8）88*38 =12*（30+8）88*38 =（12+88）38 =100*38 =3800
7.8X5.6十2.3x4.4 =(2.3+5.5)×5.6+2.3×4.4 =2.3×5.6+5.5×5.6+2.3×4.4 =2.3×5.6+2.3×4.4+5.5×5.6 =2.3×（5.6+4.4）5.5×2×2.8 =2.3×10+11×2.8 =23+（10+1）×2.8 =23+28+2.8 =51+2.8 =53.8 好了吧！
8x20-12用简算怎么算 -
8x20-12 =160-12 =148
78x36+39x28 =39x(2x36)+39x28 =39x72+39x28 =39x(72+28)=39x100 =3900
20x7、8x0、5怎么简算? -
20x7、8x0、5怎么简算？20x7、8x0、5 =20×0.5×7.8 =10×7.8 =78
89.3×43+89.3×38+893×1.9 =89.3×43+89.3×38+89.3×19 =89.3×（43+38+19）89.3×100 =8930