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2400 2.5的简便算法

2400÷2.5=240*10÷2.5=240*4=960

2400÷25=24*100÷25=24*4=96

(1)2400÷1.25÷2=2400÷(1.25*2)=2400÷2.5=(2400*4)÷(2.5*4)=9600÷10=960(2)(13.5-13.5÷15)÷0.05=(13.5-0.9)÷0.05=12.6÷0.05=252(3)3.2*7.25+7.25*6.8=(3.2+6.8)*7.25=10*7.25=72.

(4.2-0.4*6)÷4=(4.2-2.4)÷4=1.8÷4=0.45 (15300÷600+67.5)*180=(25.5+67.5)*180=93*180=1674010500÷(10500÷25*1.25)=10500÷525=20[(5.84-3.9)÷0. 4+0.15] *0.92=[1.94÷0. 4+0.15] *0.92=5*0.92=4.6(2400-480*2.5)÷1.6=1200÷1.6=750

2400 / 150 = (2400 / 10) / (150 / 10) = 240 / 15 = (240 / 3) / (15 / 3) = 80 / 5 = 16

(2400-480x2.5)÷1.6=(2400-1200)÷1.6=1200÷1.6=750 不能简便

557299的简便算法5572*99=5572*(100-1)=5572*100-5572=551628

(67/2003)x2400=(67/2003)x(2003+397)=(67/2003)x2003+(67/2003)x397=67+26599/2003=67+13+560/2003=80+560/2003

1,7分之6-7分之6÷3分之2*6分之1 =6/7-6/7÷2/3*1/6 =6/7-6/7*3/2*1/6 =6/7(1-3/2*1/6) =6/7(1-1/4) =6/7*3/4 =9/14 2,25分之7-24分之1*24*25 =7*24-25 =7*24-24-2 =6*24-1 =144-1 =143 3,3.6-72*0.025 =3.6-7.2*0.25 =3.6-3.6*2*0.25 =3.6-3.6*

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