Tens & Ones
What is 20 + 30?
50
Do you need to regroup when adding 24 + 13?
No
Break apart 36 into tens and ones.
30 + 6 or 3 tens and 6 ones
Mia has 12 cookies and gets 15 more. How many cookies?
27 cookies
12 + 15 = 27
What is 10 more than 46?
56
What is 34 + 20?
54
What is 27 + 15?
42
7 + 5 = 12. Regroup 10 ones into 1 ten.
What is 20 + 40 + 3 + 5?
68
60 + 8 = 68.
Ben has 24 stickers and gets 32 more. How many stickers?
56 stickers
True or false: 10 ones equal 1 ten.
True
What is 42 + 35?
77
40 + 30 = 70; 2 + 5 = 7.
What is 38 + 26?
64
8 + 6 = 14. Regroup and add the tens.
Add the partial sums: 50 + 13.
63
5 tens + 1 ten + 3 ones.
There are 37 red crayons and 26 blue crayons. How many altogether?
63 crayons
Find the missing number: 35 + ___ = 60.
25
35 + 25 = 60.
What is 63 + 24?
87
60 + 20 = 80; 3 + 4 = 7.
What is 46 + 37?
83
6 + 7 = 13; 4 + 3 + 1 = 8 tens.
Solve 27 + 34 using partial sums.
61
20 + 30 = 50; 7 + 4 = 11; 50 + 11 = 61.
A class reads 28 books on Monday and 35 on Tuesday. How many books?
63 books
Which needs regrouping: 42 + 25 or 47 + 28?
47 + 28
What is 51 + 38?
89
50 + 30 = 80; 1 + 8 = 9.
What is 58 + 29?
87
8 + 9 = 17; 5 + 2 + 1 = 8 tens.
Solve 48 + 35 using partial sums.
83
40 + 30 = 70; 8 + 5 = 13; 70 + 13 = 83.
A jar has 26 cookies. The teacher adds 18, then 15 more. How many cookies now?
59 cookies
Fix the mistake! A student says 56 + 27 = 73. What is the correct answer?
83
6 + 7 = 13; remember to add the new ten.