Exploring Repeated Addition with Arrays

What is the purpose of using arrays in mathematics?

• To organize objects into rows and columns

• To subtract numbers more efficiently

• To draw better pictures

• To memorize multiplication tables

Tags

CCSS.3.OA.A.1

What does repeated addition help us understand?

• How to divide numbers

• The concept of adding the same number multiple times

• The fastest way to count objects

• How to subtract numbers

Tags

CCSS.2.OA.C.4

In a multiplication sentence for arrays, what does the first number represent?

• The total number of items

• The number of groups

• The number of items in each group

• The number of arrays

Tags

CCSS.3.OA.A.1

What does the second number in a multiplication sentence of an array represent?

• The number of rows

• The total number of items

• The number of columns

• The number of items in each group

Tags

CCSS.3.OA.A.1

How many spider webs are there in total if each of three spiders made three webs?

• 12 webs

• 9 webs

• 3 webs

• 6 webs

Tags

CCSS.2.OA.C.4

If there are four flowers with three bees on each, how many bees are there in total?

• 12 bees

• 15 bees

• 9 bees

• 7 bees

Tags

CCSS.2.OA.C.4

Isabella saw two butterflies on each of five trees. How many butterflies did she see?

• 10 butterflies

• 15 butterflies

• 7 butterflies

• 5 butterflies

Tags

CCSS.2.OA.C.4

What is the first step in solving a problem using arrays?

• Writing repeated addition sentences

• Guessing the total number

• Creating groups

• Drawing the array

Tags

CCSS.2.OA.C.4

Liam found four ladybugs on each of four branches. How many ladybugs did he find in total?

• 12 ladybugs

• 16 ladybugs

• 20 ladybugs

• 8 ladybugs

Tags

CCSS.2.OA.C.4

After solving an array problem, what should you do next?

• Share it with a friend

• Forget about it

• Erase your work

• Start a new subject

Tags

CCSS.2.OA.C.4