50×80=
14×10=
60×70=
5×120=
3.9+2.5=
7.5﹣6.4=
=
6×3+9=
23×10 = 480÷8= 150÷5 = 70×30= 55÷5 = 21×40 = 360÷9= 0÷9= 810÷9= 460-200 = 22×20 = 16×5 =
200÷5=
13×40=
6.3+1.8=
535÷9≈
4200÷7=
1﹣0.8=
210×2=
61×29≈
0.125+= ﹣= 8×75%= 3÷=
2﹣20%= 0.72÷0.8= ×= 5%÷=