簡便計算:-1.53×0.75+1.53×2分之1+4分之5×1.53

簡便計算:-1.53×0.75+1.53×2分之1+4分之5×1.53


-1.53×0.75+1.53×2分之1+4分之5×1.53
=1.53×(0.5-0.75+5/4)
=1.53×1
=1.53



9.7*0.47+1.53*9.7-9.7(簡便計算)


=9.7×0.47 + 9.7×1.53 - 9.7×1
=9.7×(0.47+1.53-1)
=9.7



75*23+19*25的簡便算灋


75*23+19*25=
75*23+23*25 - 4*25 =
23*(75+25)-100 =
2300 - 100 =
2200



六分之五减括弧六分之五减五分之四括弧


五分之四



簡便計算十二分之五减括弧六分之五减十二分之五括弧要完整的簡便計算過程
快點回答.


十二分之五减括弧六分之五减十二分之五括弧
=5/12-(5/6-5/12)
=5/12-5/6+5/12
=5/12+5/12-5/6
=5/6-5/6
=0