3-2 estimate products
19X513
10,000
519x4
2,076
27x12
324
892x18
16,056
109x47
5,123
817x45
36,765
There are 14 theaters at the mall. Each theater has 175 seats. How many seats are there in all?
2,450
42X598
24,000
23x4
92
53x17
901
946x33
31,218
108x58
6,264
750x81
60,750
Brad lives 12 times as far away from the ocean as Jennie. If Jennie lives 48 miles from the ocean how many miles from the ocean does Brad live?
576
854x733
630,000
1,945x3
5,835
17x21
357
90x59
5,310
207x61
12,627
The product of the expression is 7,453.
What is the missing digit
257x_9
2
Martin ran 108 miles last year. Katrina ran 13 times as many miles as Martin last year. How many miles did Katrina run last year?
1,404
Lance has 102 packages of sports cards. Each package has 28 cards. Use rounding to estimate. About how many cards does lance have?
3,000
2,204x6
13,224
Mr.Morris bought sketchpads for 24 of his students. Each pad contained 50 sheets. How many sheets of paper were in all the pads?
1,200
A garden store sells plants in flats. There are 6 plants in each tray. Each flat has 6 trays. The garden store sold 18 flats on saturday and 21 flats on sunday. How many plants did the store sell in all?
1,404
105x24
2,520
Carolyn bought a gallon of paint that covers 250 square feet. She wants to paint a wall that is 16 feet wide and 12 feet high. Explain whether or not she will need more than one gallon of paint.
Carolyn needs sonly 1 gallon
16x12=192 192 is less than 250
Jupiter is about 5 times the distance Earth is from the sun. Earth is about 93,000,000 miles from the sun. How far is Jupiter from the sun?
465,000,000
Susan used rounding to estimate 24x413 and found 20x400. Jeremy used compatible numbers and found 25x400. Whose method gives an estimate closer to the actual product? Explain
Jeremy's 25x400=10,000
123x9
1,107
Ten years ago, Melissa planted a tree in her backyard. She has taken a photo of the tree every week so she can see how it has grown as time passed. How many photos of the tree does she have now?
520
Tricia is building a rectangular patio. The patio will be 108 bricks wide and 19 bricks long. How many bricks does she need to build the patio?
2,052
505x77
38,885
A cook at a restaurant is planning her food order. She expects to use 115 pounds of potatoes each day for 12 days. How many pounds of potatoes will she order?
1,380
A hardware store ordered 13 packs of nails from a supplier. Each pack contains 155 nails. How many nails did the store order?
2,015