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63乘以198用简便运算计算

198+63=(200-2)+63=200+(63-2)=200+61=261125乘以32 =125*(8*4)=125*8*4=1000*4=4000756-(156+189)=756-156-189=600-189=600-(200-11)=600-200+11=400+11=411

198-《37+63》

63/99*101=7/11*101=7/11*100+7/11=700/11+7/11=707/11

63*(1000-1)=63000-63=62937

63/100*101=63/100*(100+1)=63/100*100+63/100*1=63+63/100=6300/100+63/100=6363/100

解:198 * 0.51 =200 * 0.51-2 * 0.51 =102-1.02 =100.98 解:40.7-2.6 *9.3=40.7 -2.6*(10 -0.7)=40.7 -26 +2.6*0.7= 14.7 +2.6*0.7=14.7 +2.6*(1 -0.3)=14.7 +2.6 -0.78=17.3-0.78=16.52 解:5.2*10.1=5.2*(10 +0.1)=52 +0.52=52.52

六十四乘一百九十八简便方法64*198=64*(200-2)=64*200-64*2=12800-128=12672

63*7-37*7 =7*(63-37)=7*(63+37)*(63-37)=7*100*26=18200;99+198=(100-1)+198=100-200+1+198=10000-200+199=9999

29*198=29*(200-2)=5800-58=5712

198x23.5=(200-2)x23.5=200x23.5-2x23.5=4700-47=4653

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