Brain Teasers
There are two bookcases of nonfiction books. One bookcase has 7 rows with 15 books in each row. The other bookcase has 33 books. How many books are there in all?
138 books
There are 43 boys and 54 girls in third grade. How many students are in third grade?
43 + 54 = 97 students
Solve the following multiplication fact
2×4=?
8
Solve the following division facts
80÷10=?
8
Joe has 5 boxes of bananas. Each box has 8 bananas. How many bananas does Joe have in all?
5 × 8 = 40 bananas
Matt was lining his flower bed with river rocks. Each rock is 7 inches wide. The flower bed is 42 inches long. What equation will solve this problem?
42 divided by 7
400 - 283=
400 – 283 = 117
Solve the following multiplication facts
5×7=? 10×6=?
35, 60
Solve the following division facts
16÷8=?
2
Ray is a basketball player. He scored 50 points in the season. The season is 10 games. How many points did Ray score each game?
50÷10=5 points
Janet went to Barnes and Noble and spent $35 on two books. She paid using the $100 she got for her birthday. The next day, she spent $25 at Stonebriar mall. Which number sentence could be used to find how much money Janet will have after she went to the mall?
35 - 25 = ___
100 - 35 + 25 = ___
100 - 35 - 25 = ___
100 + 35 + 25 = ___
100 - 35 - 25 = ____
Mike used 173 pieces of paper. Kiyah only used 128 pieces of paper. How much more paper did Mike use than Kiyah?
173 – 128 = 45 pieces of paper
What are two multiplication sentences that have a product of 20?
5×4 and 10×2
Solve the following division facts
30÷5=?
6
Belle, Henry, Jackie, Mary, and Marcus went to the fair. They each won 5 fish. How many fish did they win altogether?
5 × 5 = 25 fish
Mr. Tibbs showed a movie after school as a reward for students who made good choices. In each row he had 5 boys and 3 girls. Once the movie started he noticed that he had 6 rows. How many students attended the movie?
48
681 + 321
681 + 321 = 1,002
Find the missing number in the multiplication sentences.
7 × __ = 28
__ × 9 = 18
4 and 2
Find the missing number in the division sentence.
25 ÷ __ = 5
5
Alexis has 32 inches of string to make bracelets. Each bracelet needs four inches of string. How many bracelets can Alexis make?
32÷ 4 = 8 bracelets
Mark made donuts on Saturday. He filled 6 shelves with 5 donuts each. Next Saturday he wants to double the amount of donuts he made. Which number sentence will help you figure out this problem?
6 + 5 + 2 =
6 + 5 - 2 =
4 X 5 ÷ 2 =
6 X 5 X 2 =
6 x 5 x 2 =
230 = ____ + 160
Find the missing number.
230 – 160 = 70
Write a fact family using the following numbers
3, 5, 15
3×5=15, 5×3=15, 15÷3=5, 15÷5=3
Solve the following division facts
125÷5=?
25
Will’s dad made 21 hotdogs for Will and his 6 friends. How many hotdogs did each child get?
21 ÷ 7 = 3 hotdogs