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83x98脱式的简便运算

=0.78x(100一2)=0,78x100一0.78x2=78一1.56=76.44

0.75*98=0.75*(100-2)=0.75*100-0.75*2=75-1.5=73.5 你好,本题以解答,如果满意,请点右下角“采纳答案”,支持一下.

27272756456

0、72x98=0.72* (100-2)=0.72*100-0.72*2=72-1.44=70.56

84*2/83=(83+1)*2/83=83*2/83+1*2/83=2+2/83=2又2/83

原式=65x98=65x(100-2)=65x100-65x2=6500-130=6370

0.65x98=0.65*(100-2)=0.65*100-0.65*2=65-1.3=63.7

22x98十44(脱式)22x98十44=22*98+22*2=22*(98+2)=22*100=2200

0.4*125*25*0.8 =(0.4*25)*(125*0.8)=10*100=1000 1.25*(8+10) =1.25*8+1.25*10=10+12.5=22.5 1.24*8.3+8.3*1.76 =8.3*(1.24+1.76)=8.3*3=24.9 9999*1001 =9999*(1000+1)=9999*1000+9999*1 =10008999 14.8*6.3-6.3*6.5+8.3*3.7 =(14.8-

0.45X98=0.45x(100-2)=0.45x100-0.45x2=45-0.9=44.1

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