Multiply by 10s
50 x 20
1,000
Estimate 26 x 35
30 x 40 = 1,200
23 x 18
414
Sharon practices piano for 2 hours on Mondays and for 1 hour on Wednesday. If she's played for 36 weeks now, how many hours has she practiced?
(1 + 2) x 36 = h
3 x 36 = h
108 hours = h
Give an example of the Commutative Property of Multiplication.
a x b = b x a
50 x 40
2,000
If I estimate 26 x 35, will the estimation be greater than or less than the actual product?
greater than
Cameron scored 18 points in his first game, 12 points in his second game, and 23 points in his third game. If his dad promised to pay him 25 cents per point, how much money will he have earned so far?
(18 + 12 + 23) x 25 = c
53 x 25 = c
1,325 cents = c or $13.25 = c
In math, an operation means you are performing one of these four actions.
addition, subtraction, multiplication, division
68 x 40
2,720
If I estimate 56 x 75, will the estimation be greater than or less than the actual product?
greater than
A travel agency charges $64 for each bus ticket and $82 for each train ticket. How much does it cost to buy 4 bus tickets and 3 train tickets.
(64 x 4) + (82 x 3) = t
256 + (82 x 3) = t
256 + 246 = t
$502 = t
What is the answer to a multiplication equation called?
Product
80 x 76
6,080
Estimate 56 x 75
60 x 80 = 4,800
Brandon's book sells for $25 each. If he sold 14 on Monday and 23 on Tuesday, how much money did he make?
(14 + 23) x 25 = m
37 x 25 = m
$925 = m
Give an example of the Associative Property of Multiplication.
(a x b) x c = a x (b x c)
89 x 70
6,230
Dakota earns $13 an hour coding. If he works 38 hours this week, about how much money will he make?
13 x 38 =
10 x 40 = $400
A bus has 15 rows of seats. Each row has 4 seats. At the first stop, 25 people get on the bus. At the second stop, 3 people get off of the bus, and 12 people get on the bus. How many empty seats are there after the second stop?
(15 x 4) - 25 + 3 - 12 = s
60 - 25 + 3 - 12 = s
35 + 3 - 12 = s
38 - 12 = s
26 seats = s
This property states that multiplying a sum by a number is the same as multiplying each addend by the number and then adding the products.
Distributive Property