0.41x98的简便运算

8.69x98=8.69x100-8.69x2=869- 17.38=851.62

0.46 * 98= 0.46 * 100 - 0.92= 46 - 0.92= 45.08

0.82X98=0.82*(100-2)=82-1.64=80.36

这个用乘法分配律做,把98看作98=100-2就可以32*98=32*(100-2)=32*100-32*2=3200-64=3136

8.69X98=8.69X(100-2)=8.69X100-8.69X2=869-17.38=851.62

100*0.51-2x0.51=49.98

0.78x98=0.78x(100-2)=0.78x100-0.78x2=78-1.56=76.44 答题不容易,望采纳,谢谢!!! 如有不懂,可追问!你的采纳是我回答的动力,谢谢!!!

0.72*(100-2)=0.72*100-0.72*2=72-1.44=70.56

0.59*98=0.59*(100-2)=0.59*100-0.59*2=59-1.18=57.82

0.78x98 =0.78x(100-2) =78-1.56 =76.45