Vocabulary
The two numbers that are multiplied together are called
Factors
Sam exercised for 40 minutes each day for 30 days. How many total minutes did he exercise?
1,200 minutes
Estimate 326 by rounding to the nearest hundred
300
700x8=
5,600
15x3=
45
To break a number apart is called
Decompose
Annie goes for a 20 minute bike ride every day for 60 days. How many total minutes did she ride her bike after 60 days?
1,200 minutes
Estimate 873 by rounding to the nearest hundred
900
90x90=
8,100
2x75=
150
The answer to a multiplication problem is called
Product
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 cost of 5 adult tickets and 8 child tickets?
$101
Estimate 915x50=
450
300x60=
18,000
256x3=
768
The boxes we use to find partial products are called
Area model
Rob swims 200 meters in the local pool. Bill swims 5 times farther than Rob. How many meters does Bill swim?
1,000 meters
A restaurant is selling tacos for $2. The manager expects to sell 215 tacos in one day. About how much money will the restaurant make from tacos in one day?
about $400
520x10=
5,200
4x78=
312
The opposite of multiplication is
Division
Ms. Isabella played 20 rounds of a game where she scored 232 points. Ms. Miller played 15 rounds of a game where she scored 473 points. Who won?
Ms. Isabella scored 4,640 points
Ms. Miller scored 7,095 points
Ms. Miller won.
A shelf contains 122 boxes of erasers. Each box contains 4 erasers. About how many erasers are on the shelf?
about 400 erasers
300x400=
120,000
31x54=
1,674