2-Digit Addition
21 + 10 = ___
31
15 - 10 = ___
5
Johnny has 56 coins. He uses 27 of them to buy lunch. How many coins does Johnny have left?
56 - 27 = 29
45 + 22 = ___
67
35 - 22 = ___
13
Sophia has 45 buttons. Peyton has 17 fewer buttons than Sophia.
Make a fact family for this problem.
45 - 17 = __
45 - __ = 17
17 + __ = 45
__ + 17 = 45
29 + 33 = ___
62
43 - 23 = ___
20
There were 33 people on the bus. Then more people got onto the bus. Now there are 82 people.
How many people got on the bus?
33 + __ = 82
82 - 33 = 49
54 + 18 = ___
72
61 - 46 = ___
15
Which choices show a way to correctly add 47 + 26?
A. 40 + 20 + 1 + 3 B. 40 + 20 + 6 + 7
C. 4 + 7 + 2 + 6 D. 60 + 7 + 6
E. 50 + 23 F. 60 + 3
B. 40 + 20 + 6 + 7
D. 60 + 7 + 6
E. 50 + 23
Kate spent $34 on toys and $16 on books. How much money did Kate spend in all?
34 + 16 = 50
50 - 22 = __
28
Harry and Ron are scientists. Last week, Harry worked for 13 more hours in the lab than Ron did. Harry worked in the lab for 41 hours last week.
How many hours did Ron work last week?
Ron worked for 28 hours last week.
Sam has solved this subtraction problem.
51 - 24 = 33
How can Sam check his answer with addition? Is he correct?
Sam can check his answer by adding 33 + 24. He will know his answer is correct if he gets a sum of 51. Sam's answer is 57.