Partial Products
Use partial products to solve 128 x 5
8 x 5= 40
20 x 5 = 100
100 x 5 = 500
500 + 100 + 40= 640
Nathan read 48 books during the year. If he reads the same number of books for 7 years in a row, how many total books will Nathan read?
336
314 x 6=
300 x 6 = 1,800
7 x _______ = 49,000
7,000
Use partial products to solve 4,538 x 6
8 x 6 = 48
30 x 6 = 180
500 x 6 = 3,000
4,000 x 6 = 24,000
27,228
Jack has a binder full of cards. He has 39 pages of baseball cards and 17 pages of football cards. Each page has 8 cards on it. How many total cards does Jack have?
448
Estimate the product:
1,877 x 4 =
2,000 x 4 = 8,000
8_6 x 3 = 2,478
2
Ben's mistake is in the tens place. He did 2 x 5 instead of 20 x 5. The correct partial products are 35, 100, and 3,500.
A hotel has 9 floors. Each floor contains 48 guest rooms, except for the first floor. The first floor has zero guest rooms. How many guest rooms are in the hotel altogether?
384
Is this estimate reasonable or unreasonable?
344 x 7 = 2,100
Reasonable. 344 is about 300. 300 x 7 = 2,100.
4,950 x 8 =
39,600
Which products have 240 as a partial product?
a. 3 x 3,388
b. 8 x 2,612
c. 4 x 5,376
d. 6 x 4,345
20
Is this estimate reasonable or unreasonable?
516 x 4 = 200
Unreasonable. 516 is about 500. 500 x 4 = 2,000 not 200.
14799 x 8=
118,392
Find the partial products for 9,999 x 9. Then find the product.
81, 810, 8,100, 81,000.
Product: 89,991
The pet store sold 3 hamsters and 6 rabbits. The cost of each pet was $79. How much money did the pet store make?
$711
Answers may vary
184,322 x 4 =
737,288