Fact Families
Related Facts
Subtraction Algebra
Word Problems
Addition Algebra
100
Write 2 addition facts for these numbers: 14, 8, 6
6+8=14 and 8+6=14
100
If 14 + 9 = 23 Then 23 - 9 = ___
14
100
8 - 6 = ___
2
100
A dog has 12 bones. Then he digs up 14 more in the yard. Now how many bones does he have?
26 bones
100
5 + ___ = 11
6
200
Write 2 addition sentences for the numbers 9,17,8
9+8=17 and 8+9=17
200
If 25 + 12 = 32 Then 32 - ___ = 25
12
200
12 - __ = 2
10
200
A circus has 17 elephants. Then 9 elephants run away. How many elephants are at the zoo now?
8 elephants
200
___ + 12 = 20
8
300
Write one addition and one subtraction sentence for the numbers 20, 8, 12
8+12=20 12+8=20 20-8=12 20-12=8
300
If 36-12 =24 then 36-24 = ___
12
300
___ - 40 = 1
41
300
A bowl of candy has 19 chocolates in it. A few students grab some chocolates and then there are only 3 left. How many chocolates were taken by the students?
19 - ____ = 3 The students took 16 chocolates
300
35 + 17 = ___
52
400
Write one addition and one subtraction problem for the numbers 34, 12, 22
12+22=34 22+12=34 34-12=22 34-22=12
400
If 31 + 27 = ? Then ? - 31 = 27 What does ? represent?
58
400
36 - ___ = 23
13
400
A classroom had 32 chairs in it. Overnight some chairs mysteriously disappeared. When we get back in the morning there were only 13 chairs in the classroom. How many chairs disappeared that night?
32 - __ = 13 19 chairs disappeared
400
4 + ___ + 7 = 27
16
500
Find the missing number and write the fact families for the numbers 25, 17, ___
___ = 42 or ___ = 8
500
What addition Problem is related to ___ - 78 = 23
23 + 78 = ___ or 78 + 23 = ___
500
___ - 120 = 120
240
500
A magician had a lot of bunnies. Then, suddenly 28 more bunnies appeared. Now the magician has 78 bunnies? How many bunnies did he have at the start?
___ + 28 = 78 He had 50 bunnies to start with
500
__ + 129 = 168
39