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48000÷64巧算

48000/64=48000/8/8=6000/8=6000/2/4=3000/4=750

3500/125 =3500/5再除以25 =700/25 =100/25*7 =4*7 =28

48000×125=60000×(8×125) =60000×1000 =60000000

48000÷32 =48000÷(8x4) =48000÷8÷4 =(48000÷8)÷4 =6000÷4 =1500

48000除以(48除以125) =48000/48*125 =1000*125 =125000 3500除以125 =7*500/125 =7*4 =28

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