先算乘,后算加,再算减:420-23×15+72
0÷16+25=________ 32-32×0=________ 13×4-42=________
(7+13)×50=________ 20×(70÷14)=________ (10+15)×4=________
65-(15+27)=________ (34-8)×2=________ (36-6)÷5=________