Adding Two-Digit Numbers on a Number Line

In this video, we explore how Cara adds blocks to her tower. Starting with 42 blocks, she adds 12 red, 14 blue, and 16 purple blocks. Using a number line, we calculate the total number of blocks at each step, ultimately reaching 84 blocks. The video demonstrates different methods to visualize and compute the addition of blocks using a number line.

How many blocks did Cara start with initially?

• 42 blocks

• 54 blocks

• 68 blocks

• 84 blocks

Tags

CCSS.2.OA.A.1

What color were the first set of blocks Cara added?

• Green

• Purple

• Red

• Blue

Tags

CCSS.RI.1.3

CCSS.RI.2.5

CCSS.RI.4.3

CCSS.RI.4.5

CCSS.RI.5.3

After adding the red blocks, how many blocks did Cara have?

• 56 blocks

• 54 blocks

• 42 blocks

• 68 blocks

Tags

CCSS.2.OA.A.1

How many blue blocks did Cara add to her collection?

• 18 blocks

• 12 blocks

• 14 blocks

• 16 blocks

Tags

CCSS.2.OA.A.1

What was the total number of blocks after adding the blue blocks?

• 72 blocks

• 84 blocks

• 68 blocks

• 54 blocks

Tags

CCSS.2.OA.A.1

How many purple blocks were added last by Cara?

• 18 blocks

• 16 blocks

• 14 blocks

• 12 blocks

Tags

CCSS.2.OA.A.1

Which number is directly below 70 on Cara's number line?

• 62

• 68

• 66

• 64

Tags

CCSS.1.NBT.C.4

CCSS.2.MD.B.6

What was the final count of blocks Cara had after all additions?

• 68 blocks

• 54 blocks

• 84 blocks

• 100 blocks

Tags

CCSS.2.OA.A.1

How many blocks did Cara need to add to reach from 70 to 84?

• 14 blocks

• 16 blocks

• 18 blocks

• 12 blocks

Tags

CCSS.2.OA.A.1

What is the correct sequence of block colors Cara added?

• Red, Purple, Blue

• Red, Blue, Purple

• Blue, Red, Purple

• Purple, Blue, Red