Addition
10 + 10
20
100 - 50
50
7 x 7
49
6/2
3
4a + 4 = 36
a=8
150 + 150
300
456 - 65
391
16 x 5
80
300/15
20
6a = 66
a = 11
1000 + 2000
3000
550 - 436
114
50 x 7
350
400/10
40
9a = 72
a = 8
700 + 750
1,450
1,000 - 575
425
20x 10
200
900/30
30
4b + 3 = 43
b = 10
500 + 750
1,250
600 - 385
215
500 x 4
2,000
1000/20
50
7x + 4 = 67
a = 9