+ + + + + Combining Numbers + + + + +
29 + 12 = ??
Draw 29 circles, then draw 12 more, count the circles.
OO OO O O OOO O O OOOO O O O O O O O OO O O O O O
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29
O O O O O O O O O O O O
30 31 32 33 34 35 36 37 38 39 40 41
Use a hundred chart. Start at 29 and count forward 12 times.
21 22 23 24 25 26 27 28 29 30
31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
Add the tens, then the ones. Add the answers.
(Remember 29 = 20 + 9 and 12 = 10 + 2)
20 + 10 = 30 9 + 2 = 11 30 + 12 = 42
Break apart one number. Add the tens, then the ones.
12 = 10 + 2 29 + 10 = 39 39 + 2 = 41
Break apart one number. Add the ones, then the tens.
12 = 10 + 2 29 + 2 = 31 31 + 10 = 41
Use the hundred chart. Start at 29, move DOWN one row for the 10 in 12 and
count up 2 times for the ones in 12.
21 22 23 24 25 26 27 28 29 30
31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
Start at 29 and count up 12 times.
29 30 31 32 33 34 35 36 37 38 39 40 41
1 2 3 4 5 6 7 8 9 10 11 12