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35十3x7脱式计算

35+3x7 =35+21 =56

57×35+43×35=(57+43)×35=100×35=3500

289一35十65 =289+(65-35) =289+30 =319

23/56x57的脱式计算 =23/56x(56+1) =23/56x56+23/56 =23+23/56 =23又23/56

原式 =5x27+63x5 =5x(27+63) =5x90 =450

19×35加十九用脱式计算要简算 19×35加十九 =19*(35+1) =36*(20-1) =36*20-36*1 =720-36 =884

脱式计算: (3-112.5%+2又1/7)×1又8/13÷3又1/56 = (1又7/8+2又1/7)×1又8/13÷3又1/56 =3又1/56×1又8/13÷3又1/56 =3又1/56÷3又1/56×1又8/13 =1又8/13 7又1/5÷0.24-2又2/7×0.875 =7.2÷0.24-16/7×7/8 =30-2 =28

7分之2+(3分之1×7分之15)×35 =7分之2+7分之5×35 =7分之2+25 =25又7分之2 结果是25又7分之2

209+102÷(52-35)=209+102÷17=209+6=215

六又十五分只十三减四分之三减三分之二 6+13/15-3/4-2/3 =6+13/15-2/3-3/4 =5+1+(13/15-10/15)-3/4 =5+3/15+(1-3/4) =5+1/3+1/4 =5+4/12+3/12 =5+7/12 =5又12分之7 谢谢,请采纳

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