14
15
18
20
19
16
4-2= 9-6= 4+5= 3+2=
1+3= 2+2= 8-4=
8-4= 4+7= 3+6= 0+5=
9+7= 7+6= 7-3= 9+9=
10+2= 5+8= 11-10= 13-3=
13-2= 10-4= 8+7= 17-4=
6+8-1= 7+3+8= 15-5-5= 10-9+13=
=
7.53﹣2.5= 45+215= ×63=
﹣= 24÷= +÷=