Category 1
Subtract. Check by adding.
12 - 4 = ___
__ + ___ = ___
12 - 4 = 8
8 + 4 = 12
Jill has 10 yellow marbles. She has 3 fewer orange marbles. How many orange marbles does she have?
7
8 + 9 = ?
? - 9 = 8
17
Nina has 16 baseball cards. Jim has 7 fewer cards than Nina. How many baseball cards does Jim have? What number sentence can you use to solve this problem?
16 - 7 = 9
Look for a pattern. Complete the pattern.
18 - 9 = 9
17 - 8 = 9
16 - 7 = 9
__ - __ = __
15 - 6 = 9
12
- 3
____
9
12 - 6 = _____
6
What addition fact would you use to check 17 - 8 = 9
9 + 8 = 17
Lucy wants to read 15 pages. She reads 9 pages before lunch. How many pages does Lucy have left to read?
6
Look for a pattern. Complete the pattern.
2 + 9 = 11
3 + 8 = 11
4 + 7 = 11
__ + __ = __
5 + 6 = 11
Write the related subtraction fact.
9 - 6 = 3
9 - 3 = 6
Write the related subtraction fact.
11 - 4 = 7
11 - 7 = 4
Create a fact family for the numbers 8, 9, 17
8 + 9 = 17
9 + 8 = 17
17 - 9 = 8
17 - 8 = 9
8 + 6 = ____
___ + ___ = ____
8 + 6 = 14
6 + 8 = 14
Look for a pattern. Complete the pattern.
10 -5 = 5
9 - 4 = 5
8 - 3 = 5
_ - _ = __
7 -2 = 5
Carla has 10 marbles. She has 6 red marbles and some blue marbles. How many marbles are blue?
4
13 - 5 = 8
8 + 5 = 13
9 + ? = 14
5
Mary has 16 beads. She gives 10 away. Then she finds 6 more beads. How many beads does Mary have now? Write the number sentences.
16 - 10 = 6
6 + 6 = 12
Mary has 12 beads.
Kara has some fish in a fish tank. She puts 8 more fish into the tank. Kara now has 10 fish. How many fish were there at the start?
10 - 8 = 2 fish
Write the related subtraction fact.
15 - 7 = 8
15 - 8 = 7
Write the related addition fact.
10 - 8 = 2
2 + 8 = 10
? + 9 = 16
7
Michael has 14 space stickers. He buys 5 more stickers. How many space stickers does Michael have now? What number sentence did you use to solve this problem?
14 + 5 = 19
9 + 6 = 15 stickers