作业帮12.5*0.4*2.5*8简便方法
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/21 17:27:57
25:481:13:16;5
24*0.4+75/2.5+0.4=0.4*(24+1)+30=0.4*25+30=10+30=40
2.5*(8-0.4)*12.5=2.5*12.5*(8-0.4)=2.5*12.5*8-2.5*12.5*0.4=2.5*(12.5*8)-(2.5*0.4)*12.5=2.5*100-1*12.5
12.5×2.5×（80＋0.4）=12.5×80×2.5+12.5×2.5×0.4=1000×2.5+12.5×1=2500+12.5=2512.5
34.8*88.8/4.44=34.8*(88.8/4.44)=34.8*20=69612.5*(6+2.4)+2.5*0.4=2.5*5*(6+2.4)+2.5*0.4=2.5*(30+12)+2.
8*0.4*1.25*2.5=（8×1.25）×（0.4×2.5）=10×1=10
3.52-25/4=3.52-6.25=-2.73
0.4*2.5=11.25*8=10等效为1000/10/1=100
=2.5x6.9+2.9x2.5+2.5x2=2.5x（6.9+2.9+2)=2.5x11.8=2.5x2x5.9=29.5
0.4*(1.25+2.5)*8=0.4×1.25×8+0.4×2.5×8=4+8=12
2.5×12.9×8=2.5×8×12.9=20×12.9=258
12.5*（8+0.4）*2.5=12.5*8*2.5+12.5*0.4*2.5=100*2.5+12.5*1=250+12.5=262.5
12.5*（8+0.4）+25=12.5x8+12.5x0.4+25=100+5+25=130
5.6+7.8+4.4=5.6+4.4+7.8=10+7.8=17.82.5x12.5x8x0.4=(2.5x0.4)x(12.5x8)=1x100=10015.8-7.32-2.68=15.8-(7
√2.5/0.4=√25/4=5/2如果本题有什么不明白可以追问,如果满意请点击右下角“好评”另外发并点击我的头像向我求助,请谅解,
12.5×0.4×2.5×8=（12.5×8）×（0.4×2.5）=100×1=100
12.5*8*0.4*2.5=100*1=100