Making Ten to Add within 20
Have the ability to add and subtract within 20 using mental strategies. 2 By end of Grade 2, know from memory all sums of two one-digit numbers. Identify missing addends to equal 10 as well as decompose one-digit numbers to make 10.
Making Ten to Add within 20 Practice
How many more to make 10?
Breaking numbers apart to make 10, a friendly number, can make it easier to add.
8 + 4 = _____
Take 2 from the 4, and add it to 8 to make 10.
10 + 2 = _____
Try it Out!
1.) 6 + 6 = ___
Draw the other dots to make a 10
2.) 4 + 9 = ___
Now draw the whole model on your own!
3.) Write an equation to match the models
_____ + _____ = _____
Making 10 to Add within 20 Activity #1
Use the number rack to help. How many different ways can you make 10?
Making 10 to Add within 20 Activity #2
a. Students can complete the activity with a partner or independently. Pass out counting chips to groups. They use the counting chips to model the equations on the activity board.
b. Circulate as students work and help as necessary. Remind students to break numbers apart to make a friendly number, 10.
Directions: Use your counting chips to model breaking apart numbers to make 10.
6 + 5 = ___
7 + 6 = _____
9 + 6 = _____
Making Ten to Add within 20 Game
a. Materials Needed: Reproducible game board, laminated for future use, and one die.
b. Students will play this game in partners. One student rolls the die and moves forward that many spaces. They land on a space and read the number. They say how many more to 10. If they are correct, they can stay on their spot. If they are incorrect, they move back one space. Whoever reaches the finish line first, wins the game.
Here are the Freebie Activities to go along with this Lesson on Making Ten to Add within 20
- Making Ten to Add within 20 Bell Ringer
- Making Ten to Add within 20 Guided Notes
- Making Ten to Add within 20 Hands On Activity
- Making Ten to Add within 20 Math Game
- Making Ten to Add within 20 Worksheet
- Making Ten to Add within 20 Lesson Plan
This Lesson if from our 2nd Grade Math Curriculum
Unit 1 – Addition and Subtraction within 100
- 1-1 Adding and Subtracting Like Units
- 1-2 Making Ten to Add within 20
- 1-3 Making Ten to Add within 100
- 1-4 Subtracting with Multiples of Ten and Single Digit Numbers
- 1-5 Taking from Ten within 20
- 1-6 Taking from Ten within 100
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