The video tutorial introduces fifth graders to lesson 3.5 on decimal addition using base 10 blocks. It explains how to model decimal addition with base 10 blocks, including flats, longs, and small cubes, to represent different place values. The tutorial provides several example problems to demonstrate the process of adding decimals and regrouping. It also includes real-world problem-solving scenarios to apply the learned concepts. Finally, the video outlines homework assignments and encourages students to self-assess their understanding of the material.

What is the main focus of lesson 3.5?

• Division of decimals

• Multiplication of decimals

• Decimal addition using base 10 blocks

• Decimal subtraction

Which base 10 block represents the ones place?

• Longs

• None of the above

• Flats

• Small cubes

How many small cubes are used to represent 0.15?

• 15

• 1

• 10

• 5

What is the sum of 0.15 and 0.36?

• 0.51

• 0.49

• 0.52

• 0.50

How many longs are used to represent 0.8?

• 8

• 7

• 6

• 9

What is the result of adding 0.8 and 0.7?

• 1.7

• 1.6

• 1.5

• 1.4

How many flats are used to represent the number 3 in 3.8?

• 4

• 1

• 2

• 3

What is the sum of 3.8 and 1.4?

• 5.2

• 5.1

• 5.3

• 5.0

How many longs are used to represent 0.71?

• 6

• 5

• 7

• 8

What is the sum of 2.71 and 2.15?

• 4.88

• 4.87

• 4.85

• 4.86