1000÷20= 15×30= 75×50= 4000÷80=
930÷30= 50×90= 0÷32 2400÷600=
28×5=
540÷6=
639+21=
18×50=
297×32≈
420÷70=
24×30=
300÷60=
51÷17=
479÷81≈
★348×27=
605×30=
879÷43=
★752÷26=
803-207= ÷5= 798+150= + =
0.25×8= 1.5- = 7.5÷ = 0.77+0.3=
9.8-8= × = 45.54÷45= 24× =