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Estimate
Algebra
Standard Algorithm
Partial Products or Distributive Property
100
3 x 10 =
What is 30?
100
32 x 8 =
What is 30 x 8 = 2,400?
100
Write a related fact for N x 3 = 12
What is 4 x 3 = 12?
100
Solve: 436 x 2 -----
What is 872?
100
Use partial products to solve: (Hint: Find the ones and tens) 45 x3 ---
What is 40 x 3 = 120 5 x 3 = 15 120+15=135
200
6 x 200
What is 1,200?
200
42 x 5 =
What is 40 x 5 = 200?
200
Write a related fact for B x 3 =24.
What is 8 x 3 = 24?
200
Solve: 7291 x 3 ------
What is 21,873?
200
Use the distributive property to solve: (Hint: use parentheses) 56 x4 ----
What is (50x4)+(6x4)=(200)+(28)=228
300
5 x 600
What is 3,000?
300
67 x 8 =
What is 70 x 8 = 560?
300
If a cheetah can run 108 feet per second, how far can they run in 6 seconds?
What is 648 feet?
300
Solve: 5042 x 5 ------
What is 25,210?
300
Use partial products to solve: 576 x 6 -----
What is 500 x 6 = 3,000 70 x 6 = 420 6 x 6 = 36 3,000+420+36= 3,456
400
7 x 4,000?
What is 28,000
400
893 x 30 =
What is 900 x 3 = 2,700?
400
About 20 inches of rain falls monthly in a coastal rain forest. About how any inches is that yearly?
What is 240 inches?
400
Solve: 48004 x 6 -------
What is 288,024?
400
Use the distributive property to solve: (Hint: Use parentheses) 683 x 4 -----
What is (600x4)+(80x4)+(3x4)=2800+320+12=3,132
500
40 x 900
What is 36,000?
500
8,251 x 6 =
What is 8,000 x 6 = 48,000?
500
What is the answer to a division problem called?
What is the quotient?
500
Solve: 23407 x 9 -------
What is 210,663?
500
Use both partial products and distributive property to solve: 8906 x 3 ------
What is 8,000x3=24,000 900x3= 2,700 6x3= 18 24,000+2,700+18= 26,718 (8,000x3)+(900+3)+(6x3)= 24,000+2,700+18=26,718