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用简便方法计算97×22.

参考

23*97+66 =(22+1)*97+22*3 =22*97+97+22*3 =22*(97+3)+97 =22*100+97 =2297

32乘22加22乘63加44 =(32+63+2)×22 =97×22 =(100-3)×22 =2200-66 =2134提交回答

97.8×100×20-97.8

97×97/98=(98-1)×97/98=98×97/98-1×97/98=97-×97/98=96又97/98

可以转换成19*777+19*223+100*223 =19*(777+223)+22300 =19*1000+22300 =19000+22300 =41300

22×23 =(20+2)×23 =20×23+2×23 =460+46 =506 4×8×25 =8×(4×25) =8×100 =800 11×4-4 =(11-1)×4 =10×4 =40 83×97 =83×(100-3) =83×100-83×3 =8300-249 =8051

12×7+17×12+112×17+117×22+…+192×97+197×102=15×[(12-17)+(17-112)+(112-117)+(117-122)+…+(192-197)+(197-1102)]=15×[12-1102]=15×2551=551故答案为:551.

97-62.2+22.2 =97-(62.2-22.2) =97-40 =57

66+97x22 =22×3+97×22 =22×(3+97) =22×100 =2200

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