Vocabulary
The answer to a multiplication sentence.
Product
6 times as many as 4 jelly beans is 24 jelly beans.
6 x 4 = 24 jelly beans
8 x 200 = ?
1,600
Estimate: 3 x 165
3 x 200 = 600
3 x 165 is about 600
Solve (Any Strategy)
$8,765 x 2 = ?
$8,765 x 2 = $17,530
To break down or apart.
decompose
108 = 9 x 12
108 is 9 times as many as 12
9 x 4,000 = ?
36,000
Estimate: 2 x 6,254
2 x 6,000 = 12,000
2 x 6,254 is about 12,000
Solve (Any Strategy)
2,900 x 7 = ?
2,900 x 7 = 20,300
The numbers that are being multiplied together.
factors
Cooper has 14 goldfish. Nando has 7 goldfish. Write an equation to show how many times as many goldfish Cooper has than Nando.
7 x 2 = 14.
Cooper has 2 times as many goldfish as Nando.
A bank teller has 6 rolls of coin. Each roll has 30 coins. How many coins does the bank teller have?
6 x 30 = 180
180 coins
Estimate: 8 x 94
8 x 90 = 720
8 x 94 is about 720
Solve (Any Strategy)
3,316 x 5 = ?
3,316 x 5 =16,580
The property that states that you decompose a factor and can multiply each addend by a number and add the products.
Distributive Property
36 is 4 times as many as _____
36 = 4 x 9
36 is 4 times as many as 9
5 x 6,000 =?
30,000
Estimate: 6 x 7,831
6 x 8,000 = 48,000
6 x 7,831 is about 48,000
Complete the inequality:
5 x 532 ____ 4 x 442
5 x 532 = 2,660
4 x 442 = 1,768
2,660 > 1,768 so 5 x 532 > 4 x 442
A method where you multiply one place value separately than add the products.
Partial Products.
Carlita saw 5 times as many robins as cardinals while bird watching. She saw a total of 24 birds. How many more robins did she see than cardinals.
5 x c = r
24 / 6 = 4
c = 4 5 x 4 = 20. She saw 20 robins.
One week a popsicle factory made 2,000 popsicles in 5 different flavors. How many popsicles did the factory make in all?
2,000 x 5 = 10,000
10,000 popsicles
Cato Drinks 8 glasses of water each day. He says he will drink 2,920 glasses of water in a year, that year has 365 days. Is the exact answer reasonable?
8 x 365 =?
8 x 400 = 3,200
Yes the exact answer is reasonable, because we rounded the factor up making the estimate slightly greater than the exact answer.
Victoria is buying stickers. She bought 3 packages of stars with 24 in each package. She bough 2 packages of rainbows with 16 in each package and 4 packages of hearts with 10 in each package. She used 82 stickers. How many stickers does Victoria have left?
3 x 24 = 72
2 x 16 = 32
4 x 10 = 40
40 + 32 + 72 = 144
144 - 82 = 62
Victoria has 62 stickers left