3.oa.3

Front

What is the total number of items in a rectangular array with 7 rows and 6 columns?

Back

To find the total number of items, multiply the number of rows by the number of columns: 7 x 6 = 42.

Front

How do you divide a total number of items equally among a group?

Back

To divide items equally, use the division operation: total items ÷ number of groups.

Front

What multiplication sentence represents an array with 3 rows and 3 columns?

Back

The multiplication sentence is 3 x 3 = 9.

Front

How do you find the number of groups when you know the total and the size of each group?

Back

Use division: total items ÷ size of each group = number of groups.

Front

If Jon runs a total of 36 laps and runs 12 laps each day, how do you find the number of days he ran?

Back

Use division: total laps ÷ laps per day = number of days. So, 36 ÷ 12 = 3 days.

Front

What is the relationship between multiplication and division?

Back

Multiplication and division are inverse operations; if a x b = c, then c ÷ b = a.

Front

How can you represent a word problem with a mathematical equation?

Back

Identify the quantities involved and the operations needed, then write an equation that reflects the problem.

Front

What is an array in mathematics?

Back

An array is a systematic arrangement of objects, usually in rows and columns, used to represent multiplication.

Front

How do you calculate the total number of items in an array?

Back

Multiply the number of rows by the number of columns.

Front

What does it mean to share items equally?

Back

Sharing items equally means distributing them so that each person or group receives the same amount.