Powers of 10/Patterns
43 x 102
4,300
68 x 93
6,324
A musical is playing at a theater that has 893 seats. What is the best estimate of the total number of tickets available for 45 seats?
a. 900 x 30 b. 800 x 50
c. 900 x 50 d. 800 x 40
C
Mrs. Trevor has a budget of $28,000. Uniforms for the marching band cost $412 each, and he needs 75 uniforms. He says, "Since 70 x 400 = 28,000, I can stay within the budget." Do you agree? EXPLAIN
456 x 89
Estimate
500 x 90 = 45,000
65 x 100
65
109 x 84
9,156
A furniture manufacturer shipped 38 cartons to a store. Each carton weighed 329 pounds. What was the total weight of the cartons?
12.502 pounds
Trevor has 994 e-books on his e-reader. Eli has 23 times as many e-books as Trevor. How many e-books does Eli have?
22,862 e-books
393 x 65 =
Estimate
400 x 70 = 28,000
56 x 1000
56,000
145 x 92
13,340
The Eagle Rock School District ordered 198 cartons of math books. The books were shipped in cartons that each held 38 books. Estimate the total number of math books in the shipment. WRITE AN EQUATION to model your work. THEN SOLVE THE ESTIMATE.
200 x 40 = x
Nicole buys envelopes for her office in boxes of 185. If she buys 28 boxes, how many envelopes will she have in all?
5,180 envelopes
Estimate
356 x 28 =
Over or Under estimate
Overestimate
53 x 101
530
809 x 77
62,293
Serena flies 893 miles round trip to visit her parents. What is the total distance, d, in miles, that she would fly for 24 visits to her parents' house? WRITE AND SOLVE AN EQUATION.
893 x 24 = d
d = 21,432 miles
Comic Books are sold for $18 each. They sold 56 on Saturday, 89 on Sunday, and 157 on Monday. Write and solve an equation to find the dollar amount of sales on Saturday.
56 x 18 = c
c = 1,008 comic books
52 x 72 =
Estimate: over- or under-estimate
50 x 70 = 3,500
Underestimate
Does 103 make each statement true?
9 x _____ = 900
45 x _____ = 45,000
165 x ______ = 16,500
80 x ______ = 80,000
no, yes, no, yes
652 x 74
48,248
On a family vacation, Mike took 1,276 digital photos. His twin sister, Amie, took 18 times as many photos as Mike. Write and solve an equation to find p, the number of photos that Amie took.
1,276 x 18 = p
p = 22,968 photos
Comic Books are sold for $18 each. They sold 56 on Saturday, 89 on Sunday, and 157 on Monday. Write and solve an equation to find the dollar amount of sales on Monday.
157 x 18 = c
c = 2,826 comic books
89 x 129 =
Estimate, Over or Under estimate
90 x 150 = 13,500
Overestimate