Understanding Addition and Number Representation

The video tutorial covers the basics of addition and subtraction using like units. It explains the concept of like units with examples, demonstrates how to create addition and subtraction sentences, and provides strategies for solving problems within 100. The tutorial introduces the Say 10 way and quick tens for calculations, and shows how to use hide zero cards to add to 10. It also offers strategies for making the next 10 and concludes with additional resources for further learning.

Why is it important to learn how to add and subtract like units?

• To become fluent in addition and subtraction

• To understand division better

• To become fluent in multiplication

• To solve problems within 1000

What are like units?

• Units that are different

• Units that are similar

• Units that are identical

• Units that are opposite

Which of the following is an example of like units?

• Books and pens

• Apples and oranges

• Ones and tens

• Cats and dogs

What is the result of adding five ones and two ones?

• Ten

• Nine

• Seven

• Five

How do you write a subtraction sentence starting with the number seven?

• 7 minus 2 equals 5

• 7 minus 5 equals 3

• 7 minus 3 equals 4

• 7 minus 1 equals 6

What is the sum of 45 plus 2 using like units?

• 46

• 49

• 48

• 47

What is the total value of a picture with four quick tens and seven ones?

• 49

• 46

• 48

• 47

What is the 'say 10' way of representing the number 47?

• 4 tens and 8

• 4 tens and 7

• 4 tens and 6

• 4 tens and 5

What is the total value of a picture with four quick tens and five ones?

• 45

• 47

• 44

• 46

What is the 'say 10' way of representing the number 45?

• 4 tens and 3

• 4 tens and 4

• 4 tens and 5

• 4 tens and 6