Vocabulary
Estimate
Area Models
Standard Algorithm
Mental Math
100
DAILY DOUBLE
The term for numbers being multiplied
3 x 5 = 15
What are factors
100
Estimate and Solve:
799 x 405 ≈ 800 x ____
What is 800 x 400 = 320,000
100
Solve using an area model:
31 x 23
What is 713
100
Solve using standard algorithm:
27 x 32
What is
27
x 32
54
810
864
100
Solve:
40 x 5
What is 200
200
The name for the answer to a multiplication problem
3 x 5 = 15
What is the product
200
DAILY DOUBLE
Estimate and Solve:
807 x 491 ≈
What is 800 x 500 = 400,000
200
Solve using area model:
343 x 21
What is 7,203
200
Solve using standard algorithm:
45 x 22
What is 990
45
x 22
90
+ 900
990
200
Solve:
70 x 9
What is 630
300
The name of this strategy:
What is area model
300
Estimate and Solve:
662 x 372
What is 700 x 400 = 280,000
300
DAILY DOUBLE
Solve using area model:
431 x 12
What is 5,172
300
Solve using standard algorithm:
743 x 49
What is 36,407
300
Solve:
300 x 60
What is 18,000
400
The name of this strategy:
372
x 65
What is standard algorithm
400
Estimate and Solve:
939 x 642
What is 900 x 600 = 540,000
400
Solve using area model:
648 x 35
What is 22,680
400
DAILY DOUBLE
Solve using standard algorithm:
312 x 551
What is 17,912
400
Solve:
4,000 x 80
What is 320,000
500
DAILY DOUBLE
The term for breaking a number into its parts using place value
For example, 34 --> 30 and 4
What is decompose
500
Estimate and Solve:
8,490 x 741
What is 8,000 x 700 = 5,600,000
500
DAILY DOUBLE
Solve using area model:
4509 x 326
What is 1,469,934
500
Solve using standard algorithm:
4,208 x 606
What is 2,550,048
500
Solve:
9,000 x 600
What is 5,400,000