Section A: Practice Problems Add and Subtract within 10

Section Summary

Details

We practiced counting collections.

Center. Counting Collections.

We added 1 or 2 by counting on. 4…5, 6

We subtracted 1 or 2 by counting back. 6…5, 4

We played games with addition and subtraction within 10.

Problem 1 (Pre-Unit)

Color in the shapes that are triangles.

  1. Shape.
  2. Shape.
  3. Shape.
  4. Shape.

Problem 2 (Pre-Unit)

How many do you see?

  1. 2 groups of dots. First group, 5. Second group, 3. 
  2. Five frame. Full. 4 dots below.

Problem 3 (Pre-Unit)

Match the pictures with the expressions.

  1. Dots. Total, 8. 5 dots. 3 dots crossed out.
  2. Group of Dots. First row, 5. Second row, 3.
  3. 6 dots. Line. 2 dots.

Problem 4 (Lesson 1)

How many do you see?

  1. 2 groups of dots. First group 3. Second group 2. 
  2. 2 groups of dots. First group, 5. Second group, 5.

Problem 5 (Lesson 2)

Circle the expression that matches the dots.

2 groups of dots. First group, 4. Second group, 3.

Problem 6 (Lesson 2)

Circle the dots that match the expression:

  1. 2 groups of dots. First group, 5. Second group, 1.
  2. 2 groups of dots. First group, 4. Second group, 1.
  3. 2 groups of dots. First group, 4. Second group, 2

Problem 7 (Lesson 3)

Find the value of each sum.

Problem 8 (Lesson 4)

Find the value of each difference.

Problem 9 (Lesson 5)

Show 2 ways you could use these cards in the game.

2 groups of dots. First group, 6. Second group, 3. 

Problem 10 (Exploration)

Materials needed:

  • Number cards 2–10

  • Two dot cubes

Directions:

  1. Choose a number card. Show 2 numbers on the dot cubes that add to make your number.

  2. Can you show another way?

Problem 11 (Exploration)

Partner A: Hold up some fingers on each hand.

Partner B: Fill in the blanks to show how many:

Switch roles and play again.