Estimate It!
Round 28 × 54 to the nearest ten to estimate the product.
30 × 50 = 1,500
What is 23 × 30
690
20 × ___ = 600
30
There are 12 bags with 15 marbles in each bag. How many marbles are there altogether? Label
180 Marbles
Which expression equals 420?
42 × 10?
42+10?
42x10
Estimate 37 × 42 by rounding each factor to the nearest ten.
40 × 40 = 1,600
What is 14 × 20
280
___ × 30 = 1,200
40
A swimmer completes 14 laps each visit. She visits the pool 12 times. How many laps does she swim?
168 Laps
Complete the equation: 16 × 10 = ___.
160
Which is the better estimate for 19 × 63? and Solve.
20 × 60 or 10 × 70
20 × 60 = 1,200
What is 32 × 40
1,280
15 × ___ = 450
30
A bakery makes 37 bagels each morning for 12 mornings. How many bagels does it make?
444 bagels
Use the distributive property to rewrite 23 × 14 as two multiplication expressions added together.
(20 × 14) + (3 × 14)
A school buys 48 boxes with 21 pencils in each box. Estimate the total number of pencils.
50 × 20 = 1,000 Pencils
What is 24 × 13
312
___ × 24 = 720
30
A lawn service earns $85 per lawn. It mows 15 lawns in June and 23 lawns in July. How much money does it earn altogether?
$3,230
An area model breaks 16 × 13 into (10 + 6) × (10 + 3). What are the four partial products?
10x10=100
10x3=30
6x10=60
6x3=18
A theater has 62 rows with 38 seats in each row. Estimate the total number of seats.
60 × 40 = 2,400 Seats
What is 46 × 27
1,242
The product is 1,440. One factor is 40. What is the other factor?
36
A craft maker makes 37 necklaces with 42 beads in each necklace. How many beads are needed?
1,554 Beads
A school orders 24 boxes of notebooks. Each box contains 36 notebooks. How many notebooks does the school order altogether? Show how you can use partial products to solve the problem.
864 Notebooks