280乘36 360乘72的简便运算
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/25 07:20:53
![280乘36 360乘72的简便运算](/uploads/image/f/257107-67-7.jpg?t=280%E4%B9%9836+360%E4%B9%9872%E7%9A%84%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97)
0.4×1.25×8×2.5=(0.4×2.5)×(1.25×8)=1×10=10
25×125×199×32=25×125×199×4×8=25×4×125×8×199=100×1000×199=19900000
28乘29乘30减28乘29乘5减25乘28乘29=28×29×(30-5-25)=28×29×0=011111乘99999=11111×11111×9=123454321×9=1111088889
36×56+72×22=36×2×28﹢36×2×22=36×2×﹙28+22)=36×2×50=3600
72乘1-72乘0.01
72*125=(8*9)*125=9*(8*125)=9*1000=9000
=28*10*36+360*72=28*360+360*72=360*(28+72)=360*100=36000
17*8*20*125=17*(8*125)*20=17*1000*20=17000*20=340000
0.45*72+45*0.18+45=45*0.72+45*0.18+1*45=45*(0.72+*0.18+1)=45*1.9=45*(2-0.1)=45*2-45*0.1=90-4.5=85.5
125×5×32×5=125×32×25=(125×8)×(4×25)=1000×100=100000
72×125×7=9×(8×125)×7=9×1000×7=9×7×1000=63×1000=63000再问:脱式再答:72×125×7=9×(8×125)×7=9×1000×7=9000×7=630
72×125=9×8×125=9×(8×125)=9×1000=9000
1×2×3×4×5×6×7×8×9×10=(1×10)+(2×9)+(3×7)+(4×5×6)=10+18+21+180=239就这么简单了.
=12.5×69+(53+72)×3.1=125×6.9+125×3.1=125×(69+31)=125×100=1250
3333*6666*9999*2222=1111*3*1111*6*1111*9*1111*2=(3*6*9*2)*1111*1111*1111*1111=324*(1111*1111*1111*11
结果是40320
LZ您好48*72/12=48/12*72=4*72=288再问:不对不用简便算法你这得数也不对啊再答:lZ对不起哈,看错了48*72*12=12*4*12*6*12*1=12*12*12*24=12