Compose and Decompose Numbers 11 to 19

In this topic, students will:

• use drawings and equations to make the numbers 11 to 19

• find parts of the numbers 11 to 19 when one part is 10

• use patterns to make and find the parts of numbers to 19

Vocabulary:

Compose - putting a number together using its parts

Decompose - taking a whole number and breaking it into two smaller parts

Pattern - a sequence of repeating numbers, objects, and shapes

At-home Practice:

Supplies:

• deck of cards

Using a deck of cards, pull out all the cards with the numbers 1 to 9. Split the deck in half. Give one-half to each player. Each player flips over 2 cards at a time. Each player adds the cards up. The player with the larger sum wins all the cards. Keep playing until one player has all the cards.