Area Models
Factor the Tens
Mental Math
Estimate then Solve
Multi-digit Multiplication
100
Draw an area model for 3 x 25
What is 75
100
Factor the tens to solve for the product. 80 x 20
What is (8 x 2) x (10 x 10) 16 x 100 1600
100
Use mental math to solve. 8 x 5 = 8 x 50 = 80 x 50 = 8 x 500 = 8 x 5,000 =
What is 40 400 4,000 4,000 40,000
100
Estimate the product. 8 x 91
What is 720
100
Multiply 6 x 714.
What is 4,284
200
Draw an area model for 4 x 721 and solve.
What is 2,884
200
Factor the tens to solve for the product. 40 x 70
What is (4 x 7) x (10 x 10) 28 x 100 2800
200
Use mental math to solve. 3 x 7 = 3 x 70 = 30 x 70 = 3 x 700 = 3 x 7,000 =
What is 21 210 2100 2100 21000
200
Estimate the product. 3 x 7,352
What is 21,000
200
Multiply 6 x 3,413
What is 20478
300
Draw an area model for 20 x 14 and solve.
What is 280
300
Factor the tens to solve for the product. 90 x 70
What is (9 x 7) x (10 x 10) 63 x 100 6,300
300
Use mental math to solve. 6 x 4 = 6 x 40 = 60 x 40 = 6 x 400 = 6 x 4,000 =
What is 24 240 2,400 2,400 24,000
300
Estimate the product. 47 x 40
What is 2,000
300
Multiply 41 x 25.
What is 1,025
400
Draw an area model for 14 x 56
What is 784
400
Factor the tens to solve for the product. 40 x 50
What is (4 x 5) x (10 x 10) 20 x 100 2,000
400
Use mental math to solve. 4 x 8 = 4 x 80 = 40 x 80 = 4 x 800 = 4 x 8,000 =
What is 32 320 3,200 3,200 32,000
400
Estimate the product. 23 x 59
What is 1,200
400
Multiply 28 x 47.
What is 1,316
500
Draw an area model for 97 x 46 and solve.
What is 4462
500
Factor the tens to solve for the product. 80 x 50
What is (8 x 5) x (10 x 10) 40 x 100 4,000
500
Use mental math to solve. 4 x 5 = 4 x 50 = 40 x 50 = 4 x 500 = 4 x 5,000 =
What is 20 200 2000 2000 20000
500
Estimate the product. 75 x 65
What is 5,600
500
Multiply 87 x 96.
What is 8,352
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