Math Activity to Teach Up and Over 10: Making 10 & Keep the Change

Math Game: Making 10 & Keep the Change 

Strand: Number Sense & Numeration
Strategy: Up Over 10



Adapted from the updated e-text by Alex Lawson, ‘What to Look For’

Materials:

• A deck of cards (Only use the 5, 6, 7, 8, & 9s) 
• Counters 

Overview:
The goal is to be the player with the most ‘change’ at the end of the game. With 2 or more players, split a deck of cards made up of the numbers 5-9. On each players turn, the player flips over 2 cards. They keep one number whole and decompose the other to make a ten with the number that was kept whole. The remaining amount is ‘change’. The change is the player’s points for that round. Students then take counters for that amount. This helps the students keep track of their score.



How This Supports Student Learning:
This game will help solidify the Anchors of 10 and the Up Over 10 strategies. By decomposing one number to create a ten students’ will increase their flexibility with numbers and strengthen their understanding of the part-whole relationship between numbers. As well, the Up Over 10 strategy is a precursor to grasping ‘carrying’ that happens in the standard algorithm for addition.



Where to Next:
When students are ready to extend this strategy, make the values of the cards drawn worth ten times the amount, as seen in the video. This will help them use the strategy with bigger numbers.



If your students are grasping the Up Over 10 strategy, encourage them to transfer the skill to Up Over other decade numbers. For example,

27 + 8

=27 + 3 + 5

= 30 + 5

= 35



Want a home extension?
Send this link home with students and ask them to play Break Apart!

https://gregtangmath.com/games