Subtraction and Number Concepts

This video reviews lesson 4.5, focusing on subtracting by breaking apart numbers to make a 10. The example used is 13 minus 5, where the number 13 is broken into 10 and 3. The process involves subtracting 3 to make 10, then subtracting 2 more to reach the final answer of 8. The video provides a step-by-step guide to this subtraction method.

What is the main focus of lesson 4.5?

• Dividing numbers

• Multiplying numbers

• Adding numbers

• Breaking apart numbers to subtract

Which pages in the workbook correspond to lesson 4.5?

• Pages 100-101

• Pages 90-91

• Pages 81-82

• Pages 75-76

What is the initial problem discussed in the lesson?

• 10 minus 3

• 15 minus 7

• 13 minus 5

• 12 minus 4

How many 10 frames are needed to represent the number 13?

• 4

• 1

• 2

• 3

What is the first step in breaking apart 13 to subtract?

• Take away 5

• Take away 3

• Add 5

• Add 3

After taking away 3 from 13, what number is left?

• 10

• 9

• 8

• 7

Why do we take away 3 first in the subtraction process?

• To make a 20

• To make a 15

• To make a 10

• To make a 5

What is the next step after making a 10?

• Subtract 5

• Add 2

• Subtract 2

• Add 5

How many circles are left in the first 10 frame after subtracting 2?

• 9

• 6

• 7

• 8

What is the result of 13 minus 3?

• 11

• 12

• 10

• 9