Unit 3 Lesson 20

Front

What is multiplication?

Back

Multiplication is a mathematical operation where a number is added to itself a certain number of times. For example, 3 x 4 means adding 3 four times: 3 + 3 + 3 + 3 = 12.

Front

What does the expression (2 x 3) + (2 x 3) represent?

Back

This expression represents the total number of toy cars on 4 shelves, with each shelf having 3 cars. It can be calculated as (2 x 3) for two groups of 3 cars.

Front

How do you find the total number of items when you have groups?

Back

To find the total number of items in groups, multiply the number of groups by the number of items in each group.

Front

What is addition?

Back

Addition is a mathematical operation where two or more numbers are combined to get a total. For example, 2 + 3 = 5.

Front

What is subtraction?

Back

Subtraction is a mathematical operation where one number is taken away from another. For example, 5 - 2 = 3.

Front

If Amari has 79 Lego bricks and gets 109 more, how many does he have now?

Back

Amari has 79 + 109 = 188 Lego bricks.

Front

How do you find out how many more items you need to reach a goal?

Back

To find out how many more items you need, subtract the number of items you have from the total goal.

Front

What is the total cost if each tub of popcorn costs $5 and you need to sell 7 more tubs?

Back

The total cost is 7 tubs x $5/tub = $35.

Front

What is the total amount raised if Panthers Elementary has raised $465 and needs to reach $500?

Back

They need to raise $500 - $465 = $35 more.

Front

What is a word problem in math?

Back

A word problem is a mathematical question presented in a narrative form, requiring interpretation and problem-solving skills.