About How Much
Partial Products
Area Model
Standard Algorithm
Word Problems
100
About how much is 10x23
What is 200
100
What are the partial products of: 12x13
What are 6, 30, 60, 100
100
Use an area model to solve: 12x14
What is 168
100
49x13=
What is 637
100
There are 19 students in Mr. Lee's class. Each student has a box containing 26 crayons. Use rounding to estimate the total number of crayons in Mr. Lee's class.
What is 600 crayons
200
About how much is: 36x21
What is 800
200
What are the partial products of: 25x32
What are: 10, 40, 150, 600
200
Use an area model to solve: 20x35
What is 700
200
67x12=
What is 804
200
The pizza parlor uses 30 pieces of pepperoni on each large pizza. The pizza parlor made 70 large pizzas. How many pieces of pepperoni were used?
What is 2,100 pieces
300
About how much is: 45x65
What is 3,500
300
What are the partial products of: 47x82
What are 14, 80, 560, 2,400
300
Use an area model to solve: 24x72
What is 1,728
300
55x63=
What is 3,465
300
Joey's scout troop is building 15 birdhouses. Each birdhouse uses 20 nails. How many nails does the troop need in all?
What is 300 nails
400
About how much is: 78x32
What is 2,400
400
What are the partial products of: 79x66
What are 54, 420, 540, 4,200
400
Use an area model to solve: 83x61
What is 5,063
400
92x74=
What is 6,808
400
A garden has 14 rows of blue flowers. Each row contains 15 flowers. Write and solve an equation to find the number of flowers in the garden.
What is 14x15=f, 210 flowers
500
About how much is: 98x81
What is 8,000
500
What are the partial products of: 87x96
What are 56, 560, 630, 7,200
500
Use an area model to solve: 96x69
What is 6,624
500
98x97=
What is 9,506
500
Mary makes $18 a day babysitting. How much does she earn if she works 20 days in 6 months?
What is $108