Using Benchmark Numbers in Addition

The video tutorial introduces second-grade addition and subtraction strategies using friendly numbers and tape diagrams. It explains how to simplify math problems by adjusting numbers to create easier calculations. The tutorial covers both addition and subtraction, demonstrating how to use these strategies for more complex problems. The video concludes with a summary of the strategies discussed.

What is the main goal of using friendly numbers and tape diagrams in math problems?

• To make math problems more complex

• To make math problems easier

• To avoid using numbers

• To increase the number of steps in a problem

In the example of 61 + 29, what number is 61 adjusted to?

• 50

• 60

• 70

• 80

What is the benchmark number used for 29 in the example of 61 + 29?

• 25

• 20

• 30

• 35

How does adjusting numbers to benchmark numbers help in addition?

• It simplifies the addition process

• It makes the numbers larger

• It makes the numbers smaller

• It complicates the addition process

In the example of 28 + 43, what is the benchmark number for 28?

• 20

• 30

• 25

• 35

What adjustment is made to 43 in the example of 28 + 43?

• Subtract 3

• Add 2

• Subtract 2

• Add 3

Why is 30 + 41 considered easier than 28 + 43?

• Because both numbers are round

• Because 30 is a round number

• Because 41 is a round number

• Because 30 and 41 are closer to each other

In the subtraction example of 62 - 30, what adjustment is made to 29?

• Subtract 2

• Add 2

• Subtract 1

• Add 1

What is the new subtraction problem after adjusting 62 and 29?

• 62 - 30

• 61 - 29

• 60 - 28

• 63 - 31

How does adjusting numbers help in subtraction?

• It changes the difference

• It keeps the difference the same

• It makes the numbers larger

• It makes the subtraction more difficult