Estimates
What is the best estimate of 23 x 48?
a. 80
b. 1000
c. 8000
b. 1000
How can you use the Distributive Property to find the product? Complete the equation.
5 X 6 = (___ x 3) + (5 x ___)
= _____ + ______
=_____
5 x 6 = (5 x 3) + (5 x 3)
= 15 + 15
=30
4 x 78?
312
Rodney swims 200 meters in the local pool. Bill swims 3 times farther than Rodney. How many meters does Bill swim?
600
10 x 10
100
What is the best estimate for 62 x 29?
a. 60
b. 600
c. 1200
d. 1800
d. 1800
How can you use the Distributive Property to find the product? Complete the equation.
12 X 5 = (___ x 5) + (2 x ___)
= _____ + ______
=_____
12 X 5 = (10 x 5) + (2 x 5)
=50 + 10
=60
3 x 256
Elijah builds a raised garden that is 9 yards wide and 32 yards long. What is the area of the garden?
9 x 32 = 288 square yards
70 x 20
1,400
A shelf contains 142 boxes of erasers. Each box contains 4 erasers. About how many erasers are on the shelf? (to the nearest 50)
about 600 erasers
How can you find the product? Use partial products to solve.
3 x 642 = (3 X ___) + (3 x ___) + (3 x ___)
=___ + ____ + ____
=_________
3 x 642 = (3 X 600) + (3 x 40) + (3 x 2)
= 1800 + 120 + 6
= 1926
63 x 21
1,323
Rachel buys building supplies for her shop. A box of nails costs $6 and a sheet of plywood costs $11. What is the total cost of 15 boxes of nails and 18 sheets of plywood?
(6 x 15) + (11 x 18)
=90 + 198
=288
700 x 8
5,600
Which is a reasonable estimate of the product of 4921 x 4? (to the nearest thousandths place)
2,000
How can you use partial products to solve? Complete the equation.
31 x 54 = (30 x ___) + (___ x 4) + (___ x 50) + (___ x 4)
=___ + ____ + ____ + ___
=______
31 x 54 = (30 x 50) + (30 x 4) + (1 x 50) + (1 x 4)
=1500 + 120 + 50 + 4
=1,674
273 X 43?
11,739
Jeff is going to the movies with his family and friends. An adult ticket costs $9 and a child ticket costs $7. What is the total of 5 adult tickets and 8 child tickets?
(9 x 5) + (7 x 8)
=45 + 56
=$101
3 x 8000?
24,000
A restaurant is selling tacos for $2. The manager expects to sell 215 tacos in 1 day. Choose the best ESTIMATE for how much money the manager can expect to make on tacos in that day.
about 400
How can you find the product using partial products?
5 x 2245 = (5 x ___) + (5 x ___) + (5 x ___) + (5 x ___)
= ___ + ___ + ___ + ___
=___
5 x 2245 = (5 x 2000) + (5 x 200) + (5 x 40) + (5 x 5)
= 10,000 + 1,000 + 200 + 25
=11,225
Mandy receives 1,375 points for each level completed in an online math game. she completes 6 levels. How many points does she receive?
1375 x 6 = 8,250
Maya plans to set up 28 tables in the auditorium. Each table will take up 55 square feet of space. How many square feet of space will Maya need?
55 x 28 = 1540
Kate read for 40 minutes every day for 30 days. How many total minutes did she read?
1200 minutes