Addition
5+6
11
4-1
3
25
4 rows of 3
4x3
300+40+9
349
4+3
7
6-2
4
5 tens 7 ones
57
7 rows of 2
7x2
400+5+7
457
6+7
13
10-5
5
1 ten 1 one
11
9 rows of 9
9x9
700+10+6
716
9+7
16
15-6
9
4 hundreds 6 tens 9 ones
469
8 groups of 5
8x5
200+30
230
12+7
19
20-7
13
7 hundreds 3 tens 5 ones
735
3x8
600+5
605