Missing Numbers
Problem Situations
Match the Equation
Match the Equation
Problem Situations
Solve
Solve
Facts and Strategies
Number Rack
100
Fill in the missing number in each equation.
9 + __ = 6 + 4
8 + 8 = 7 + __
9 + 1 = 6 + 4
8 + 8 = 7 + 9
100
Alexander went to the candy store and bought 12 lollipops and 8 chocolates. How many candies did he buy in total?
12-8=n
n+8=12
12+8=n
12+n=8
3. 12+8=n
100
Heidi ran 70 feet. Gretchen ran 48 feet. How much farther did Heidi run than Gretchen?
Heidi ran 22 feet farther than Gretchen.
100
Solve 8+6 using two different strategies.
8+6=14
100
Write an equation that matches the beads on the left side.
7+6=13
200
Fill in the missing number in each equation.
18 - ___ = 10
7 = 17 - ___
18 - 8 = 10
7 = 17 - 10
200
Mark has 35 character game cards. He needs 80 character game cards to make a full deck to play the game with. How many more character game cards does Mark need to play the game? Choose all that apply.
35+n=80
80+35=n
80-n=35
80-35=n
1. 35+n=80
3. 80-n=35
4. 80-35=n
200
The farmer has 260 bales of hay in the barn. He puts 85 more bales of hay in the barn. How many bales of hay are in the barn now?
There are 345 bales of hay in the barn now.
200
Solve 15-7 using two different strategies.
15-7=8
200
How can you use 8+8 to help you figure out how many beads are on the left side?
(8+8)+1=17
300
Fill in the missing number in each equation.
38 = 76 - ___
38 = 76 - 38
300
There were 26 people on the ferris wheel. Eighteen of them were kids. The rest were adults. How many adults were on the ferris wheel? Choose all that apply
26+n=18
26-18=n
18+26=n
18+n=26
2. 26-18=n
4. 18+n=26
300
Some Emperor penguin eggs hatch. Soon 63 more Emperor penguin eggs hatch. A total of 98 eggs hatch. How many Emperor penguin eggs hatched at the start?
35 Emperor penguin eggs hatched at the start.
300
Solve 17+38 using two different strategies.
17+38=55
300
Which expressions match the beads on the left side? Choose all that apply.
(5+1)+(5+3)
6+8
7+7
10+1+3
1. (5+1)+(5+3)
2. 6+8
4. 10+1+3
400
Fill in the missing number in each equation.
25 + 46 = ___ + 47
25 + 46 = 24 + 47
400
Steve was collecting toys for the neighborhood cats. He had 18 cat toys. His aunt gave him 16 more. Steve gave 15 of the toys to the cats next door and let his cats have the rest. How many toys did his cats get?
18+15+16=n
(18-16)+15=n
(16+15)-18=n
(18+16)-15=n
4. (18+16)-15=n
400
There are 85 students eating lunch in the cafeteria. Thirty-eight of the students brought their lunch from home. How many students did not bring their lunch from home?
47 students did not bring their lunch from home.
400
Solve 76-27 using two different strategies.
76-27=49
400
Solve 38+46=n using give and take.
38+46=40+44 OR 38+46=34+50
500
Fill in the missing number in each equation.
167 + ___ = 298 + 165
167 + 296 = 298 +165
500
Kiara wrote a story on the computer. She printed 5 copies of it to share with her friends. Each copy of the story used 4 pieces of paper. How many pieces of paper did she use in all?
5+4=n
5x4=n
5-n=4
4+4+4+4+4=n
2. 5x4=n
4. 4+4+4+4+4=n
500
Jamal was riding his bike. First, he rode to the store, which took 38 minutes. Then he rode his bike to the library, which took 26 minutes. Finally, Jamal rode home. The whole trip took him 108 minutes. How long did it take Jamal to ride his bike home from the library?
It took Jamal 44 minutes to ride his bike home from the library.
500
Solve 64-29 using ONE strategy. Show the strategy on a number line AND with equations.
64-29=35
500
Solve 754+98=n using give and take.
754+98=752+100