ADDITION
21+10=21+3+7
TRUE
10-_=-5
-15
10*11=
110
14/2=
7
10*10=99+2
FALSE
10+500=
510
-5+10=
15
18*2=
36
65/13=
5
14/7=
2
31+41= 7
72
70-20=
50
5*12= 5*11=
(1 60) (2 55)
110/11=
10
18*2=
36
10+_=100
90
40-40=
0
5*13=
65
40/8=
5
99+10
109
999_____1005
1000 1001 1002 1003 1004
50-50=
0
2_ _8 10 12 14_ _?
4 6 16 18
50/10=
5
80-_=69
11