500+160=
630﹣530=
8×7=
42÷7=
50+340=
740﹣40=
4×9=
27÷9=
45-16+23= (37+17)÷6= 28-48÷6=
45+(72-39)= 5×7-19= 4×3÷2=
64-(26+8) 56-36÷4
(70-46)÷8 20÷4×7
16÷4= 24÷8= 35÷5= 42÷7=
40÷5= 1200-600= 400+600= 900+500=
36÷6= 1300-800=
5×8=
45+15=
100-23=
23+36+15=
9×6=
22÷8 =
54÷9 =
100-22-78=
24÷6= 35÷7= 56÷8= 64÷8=
14÷7= 42÷6= 63÷7= 32÷4=
8÷8= 16÷4= 28÷4= 27÷9=
42÷6=7、20-7=13
32+16=48、48÷6=8
1-0.92= - = ×3.2= ÷ ×5=
3.5+4.28= × = ÷ = 99×0.9+0.9=