Vocabulary
What is the answer to a multiplication problem called?
Estimate 234 × 6 by rounding 234 to the nearest ten.
(≈ 230 × 6 = 1,380)
Solve: 325 × 2
(650)
A box holds 325 pencils. If the school buys 4 boxes, how many pencils in total?
(1,300)
True or False: Every product has more than one set of factors.
True
What is the answer to a multiplication problem called?
Factors
200: Estimate 321 × 28 by rounding 28 to the nearest ten.
(≈ 321 × 30 = 9,630)
Solve: 436 × 12 (5,232)
(5,232)
A bus has 48 seats. If there are 16 buses, how many seats are there?
(768)
Solve: 315 × 25
(7,875)
A step-by-step way to solve a math problem is called a(n) ____.
Estimate 489 × 17 by rounding both numbers.
(≈ 490 × 20 = 9,800)
Solve: 218 × 24
(5,232)
A farmer plants 246 trees in each field. He has 12 fields. How many trees are there?
(2,952)
A concert sells 428 tickets each night for 32 nights. How many tickets sold?
(13,696)
When you round to find a quick answer, what is this called?
Estimate
A factory makes 612 pencils each day for 29 days. Estimate the total pencils made.
(≈ 600 × 30 = 18,000)
Solve: 342 × 16
5,472
A stadium has (9,504) total seats. If there are 18 sections, how many seats are in each section?
528
Multiply: 729 × 48
(34,992)
What do we call breaking apart multiplication into smaller partial products?
Partial Products
Estimate 4,812 × 46 by rounding to the nearest thousand and ten.
(≈ 5,000 × 50 = 250,000)
Solve: 472 × 35
(16,520)
A company prints 624 books every day for 27 days. How many books do they print?
(16,848)
A factory makes 1,236 toy cars each day. How many are made in 47 days?
(58,092)