63×29-63×19,720÷5÷12,32×25×125,35×16+35×72+35×12
63*29-63*19=63*(29-19)=63*10=630
720÷5÷12=720÷(5*12)=720÷60=12
32*25*125=4*8*25*125=(4*25)*(8*125)=100*1000=100000
35*16+35*72+35*12=35*(16+72+12)=35*100=3500