Division Stories
Division with Remainders
Multiplying by Multiples of 10
Doubles and Halves
Strategies for Multiplication
100
The 48 fourth graders at the Glendale School are taking a field trip to the science museum. The students need to split into groups of 3. How many groups will there be?
What is 16 groups?
100
39 divided by 6
What is 6 R3.
100
Every year, Ms. Anderson orders a box of 50 erasers for each classroom at the Riverview School. There are 11 classrooms in the school. How many erasers does Ms. Anderson order?
What is 550 erasers?
100
8 x 4= 16 x 4=
What is 32, and 64? 8 is half of 16 so to find 16 x 4, you can double your answer of 32 from 8 x 4.
100
Draw an 13 by 8 array. Break up this big array into two smaller arrays. Write the equations.
What is (10 x 8) + (3 x 8)= 13 x 8?
200
Mrs. Santos bought a box of 84 oranges. She wants to put the oranges into 6 rows. How many oranges will be in each row?
What is 14 oranges in each row?
200
44÷8
What is 5 and a half or 5 1/2.
200
Last month Lakewood School ordered 8 boxes of erasers with 20 erasers in each box. How many erasers did they order?
What is 160 erasers?
200
Ms. Santos has 120 apples. She wants to pack them into boxes with 20 in each box. How many boxes does she need?
What is 6 boxes?
200
Solve using a cluster problem: 7 x 3=? 7 x 30=? 7 x 4=? Write the final problem.
What is 7 x 3=21 7 x 30=210 7 x 4= 28 7 x 34=238
300
Bill and Jake made 52 snowballs. They wants to share the snowballs with 2 more of their friends. How many snowballs would each person receive?
What is 13 snowballs?
300
There are 44 people taking a trip in vans. Each van only holds 8 people. How many vans will the people need?
What is 44÷8 is 5 and a half. You need 6 vans because you do not want to leave anyone behind.
300
40 x 5= 400 x 5=
What is 200, and 2,000?
300
15 x 8= 30 x 4= Does 15 x 8=30 x 4? Why?
What is 120, and yes the equations are equal because of doubling and halving. 15 is doubled in order to make 30 and 8 is cut in half in order to create 4. If you double one number and cut the other in half, it doesn't change the answer.
300
I have two small arrays inside a big array: 20 x 4 and 4 x 4 What equation will represent the big array made by these two small arrays?
What is 24 x 4= 96?
400
Alice ordered 160 cupcakes for a school event. The boxes can only hold 8 cupcakes. How many boxes will she need to pick up from the store.
What is 20 boxes?
400
If 5 people share 37 crackers equally, how many crackers will each person get?
What is 7 R2, so each person would receive 7 crackers so it is fair.
400
Last year, Mr. Johnston ordered 70 packs of paper. This year, he orders 6 times as many packs of paper. How many packs of paper did Mr. Johnston order this year?
What is 420 packs of paper?
400
140 x 2=? 70 x 4= ?
What is 280? 140 x 2=280 and 70 x 4= 280. You cut 140 in half in order to get to 70, and double 2 to get to 4. Since you are doubling one number and halving the other number, the answer is the same for each equation.
400
Choose three equations that can be used to find 5 x 75. a. 5 x 75= 5 x (70+5) b. 5 x 75=5 + (70+1) c. 5 x 75= (5 x 70) +1 d. 5 x 75=(5 x 70) +(5 x 5) e. 5 x 75=370 +5
What is: a. 5x 75= 5 x 75= 375 d. 5 x 75=(5 x 70) +(5 x 5) e. 5 x 75=370 +5
500
The maintenance charge collected from 8 houses is $120. What is the maintenance charge per house?
What is $15.
500
There are 183 cookies and 7 hungry children. How many cookies would each child be able to eat if they were divided as equally as possible?
What is 26 R1. Each child would receive 26 cookies.
500
What is changing from 5 x 6 to 5 x 60? Create a representation to solve. 5 x 6 means 5 groups of 6 ones, 5 x 60 means 5 groups of 6 tens or 5 x (6 x10)
What is 5 x 6 means 5 groups of 6 ones, 5 x 60 means 5 groups of 6 tens or 5 x (6 x10)?
500
15 x 8=? 30 x 4=? Use arrays, pictures, or story context to show how the two problems are related.
What is 120?
500
Which of the following are equivalent to 42 x 96? Circle the three expressions below that are equivalent to 42 x 96. a. (14x3)x(4x24) b. (7x6)x(12x8) c. (3x21)x(2x96) d. (2x7)x(12x8) e. (21x2)x(3x32)
What is a. (14x3)x(4x24) b.(7x6)x(12x8) e. (21x2)x(3x32)
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