Numberline
Base 10 Shorthand
Decompose 1 Addend by Place Value
Adjust Addends to make Friendly Numbers
Fact Families
Story Problems
100
9 - 4 = ?
5
100
46 - 21 = ?
25
100
39 - 12 = ?
27
100
29 - 13 = ?
6
100
Which related addition equation could you use to solve this subtraction problem?
6 - 2 = ?
2 + ? = 6
or
? + 2 = 6
100
There were 26 birds in a tree. 11 of them flew away. How many birds are left in the tree?
15 birds
200
15 - 6 = ?
9
200
87 - 54 = ?
33
200
59 - 34 = ?
25
200
39 - 15 = ?
14
200
Which related addition equation could you use to solve this subtraction problem?
57 - 44 = ?
44 + ? = 57
or
? + 44 = 57
200
Harvey played 42 soccer games this season. His team won 36 of them. How many games did they lose?
42 - 36 = 6 games lost
300
32 - 11 = ?
21
300
40 - 3 = ?
37
300
99 - 75 =
24
300
45 - 27 = ?
18
300
Which related subtraction equation could you use to solve this addition problem?
37 + ? = 98
98 - 37 = ?
or
98 - ? = 37
300
Rosie was making some bracelets. She made 53 total. 34 of them were Chicago Bears bracelets and the rest were Barbie bracelets. How many Barbie bracelets did she make?
53 - 24 = 29 Barbie Bracelets
400
Which equation represent this number line?
14 - 5 = 9
400
51 - 26 = ?
26
400
93 - 26
67
400
81 - 46 = ?
35
400
Which related subtraction equation could you use to solve this addition problem?
? + 66 = 83
83 - 66 = ?
or
83 - ? = 66
400
Stelios has 50 pets in Prodigy. 25 are fire pets, 13 are earth pets, and the rest are water pets. How many water pets does he have?
Hint: 2-step problem
Step 1: 50 - 25 = 25
Step 2: 25 - 13 = 12
Answer: 12 water pets
500
85 - 36 = ?
49
500
92 - 78 = ?
14
500
101 - 83 = ?
18
500
Which way shows how to adjust the numbers to subtract? Chose all correct answers.
82 - 59 = ?
a.) 80 - 60
b.) 80 - 57
c.) 83 - 60
d.) 80 + 60
B and C
500
How many equations can you make using only these 3 numbers? Show me all of them!
42 15 27
You can make 4 equations.
27 + 15 = 42
15 + 27 = 42
42 - 15 = 27
42 - 27 = 15
500
Chloe and Nora drew a total of 107 pictures at their playdate last week. Chloe drew 54 of those points. How many did Nora score?
107 - 54 = 53 points