431+57+269=57+(+)
25×(×)=(×4)×37
1000-a-b=1000( )
b×a+25×=( )×b
÷(9×2)= 630÷
53×+x×=a×( 53)
①308×25=
②26×632=
③648÷57=
④*332÷43=
⑤526÷64=
⑥120×42=
⑦4050÷70=
⑧*336×12=
17-5.8-4.2 46+46×99 77+63÷7×4
7.9+6.37+12.1+3.63 25×32×125 360÷(80-14×5)
242-77+58-123 48×25 12 - 7.6+3.9
8.1÷0.03= +3= ×= ﹣=
×= 134﹣18= ×0÷3= 7.45+8.55=