Estimation
A game store sells video games for $22. The game owner expects to sell 8 video games in one hour. Choose the best estimate for how much money the game store owner can expect to make on video games in one hour?
A. about $1,600
B. about $160
C. about $240
D. about $200
B. about $160
Write the multiplication equation based on the area model:
What is 486 x 29 =
8 x 4 = (___ x 4) + (2 x ___)
= ____ + ____
= ______
8 x 4 = (4 x 4) + (2 x 4)
= 16 + 8
= 24
20 x 20 = ___
400
What is the product? 67 x 9
A. 963
B. 540
C. 543
D. 603
D. 603
Which is a reasonable estimate of the product of 2,813 and 5?
A. 15,000
B. 8,000
C. 10,000
D. 1,500
A. 15,000
What is the product of 8 x 619? Fill in the area model to find the partial products.
4,800 + 80 + 72
b. 4,952
15 x 9 = (___ x 9) + (5 x ___)
= ____ + ____
= _____
15 x 9 = (10 x 9) + (5 x 9)
= 90 + 45
= 135
50 x 90 = ____
4,500
56 x 7 = ___
392
The mail carrier delivers to 208 houses each day. About how many deliveries does the mail carrier make in 5 days?
What is about 1,000 deliveries
74 x 57 = _____
4,218
70 x 20 = 70 x _____ tens
= _____ tens
= ________
70 x 20 = 70 x 2 tens
= 140 tens
= 1,400
100 x 1,000
100,000
What is the product?
8 4
x 7 7
6,468
Use rounding to estimate the product:
3,425 x 8 = ______
What is 24,000
157 x 49 = _____
7,693
90 x 50 = (9 x 10) x (___ x 10)
= (___ x 5) x (10 x 10)
= ____ x 100
= _____
90 x 50 = (9 x 10) x (5 x 10)
= (9 x 5) x (10 x 10)
= 45 x 100
= 4,500
7,500 x 100
750,000
What is the product?
7 6
x 3 8
2,888
Use a range to estimate the product:
1,256 x 7 = ______
What is 8,400 - 9,100
How can you use an area model to multiply 172 x 94?
16,168
Tisha counted 20 cases of water at the picnic. There are 40 bottles of water in each case. How many bottles of water are at the picnic?
20 x 40 = (2 x 10) x (4 x 10)
= (2 x 4) x (10 x 10)
= 8 x 100
= 800
1,000,000 x 1,000,000
1,000,000,000,000
Katya is going to the movies with her friends and family. An adult ticket costs $11 and she buys 4 tickets. She spends twice as much on child tickets. How much does she spend on child tickets? Use equations to solve.
44 x 2 = $88
$88