Make a Number Line to Add — Let's Practice!
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Basics on the topic Make a Number Line to Add — Let's Practice!
Let's practice addition using a number line with Razzi!
Transcript Make a Number Line to Add — Let's Practice!
Razzi says get a piece of paper and a pencil ready! (...) Because today we're going to practice... Make a number line to add! It's time to begin! There are many different tools and strategies to add (...) a great one is using a number line! Let's practice making a number line to add. If Mr. Squeaks has thirty-four screws and twenty-six nails, how many will he have all together? You can start by drawing a number line... and putting the larger addend, or number on the LEFT. Then, count by small amounts forward of the SECOND addend. Did you also get sixty? Let's tackle the next problem! If Mr. Squeaks has fifty green paper clips and sixteen blue ones, how many does he have all together? Remember to draw a number line... and put the larger addend on the LEFT. Then, count forward by small amounts of the second addend. Did you also get sixty-six? Let's tackle the last problem! If Imani has sixty-two mini-erasers and twenty-two stickers, how many things do they have in total? Remember to draw a number line... and put the larger addend on the LEFT. Then, count forward by small amounts of the second addend. Did you also get eighty-four? Razzi had so much fun practicing with you today! See you next time!
Make a Number Line to Add — Let's Practice! exercise
Show the steps of using a number line to solve a problem.Hints
Try making your own number line to solve 17 + 22. What did you do first?
Think about the problem step by step. Before we count forward by the second addend, what do we need to do?Solution
The steps to using a number line to solve a problem are:
- Draw a number line.
- Put the larger addend on the left.
- Count forward by small amounts from the second addend.
- Solve the equation.
Show how to add using the number line.Hints
Remember, put the larger addend on the left.
Think about the gaps at the top, that is where we move forward with small amounts of the second addend. The gaps start with + __.
The addends are filled in. Place the sums below on the number line.Solution
This is how we use a number line to add!
The larger addend 76 is on the left. The smaller addend 16 is split into small amounts (+10 and +6).
76 + 16 = 92.
Use the number line to add the numbers and find the answer.Hints
Remember, first we put the larger addend on the left. Which number is larger?
Once the larger addend is on the left, count forward by small amounts of the second addend. Fill in the blanks as you count on.Solution
53 + 32 = 85.
We start at the larger addend, 53. From there, we add the smaller addend 32 by small amounts (10 + 10 + 10 + 2) until the numbers are added to make 85.
Use the number line to solve the equation.Hints
Remember, put the larger addend on the left.
To fill in the numbers on the top, think about how to split up the number 12 into smaller amounts.
The addends are filled in on the number line. Can you place the sums below?Solution
64 + 12 = 76.
First, we put the larger addend 64 on the left. Then, we split 12 into smaller amounts (10 + 2). 64 + 10 = 74, 74 + 2 = 76.
Complete the number line.Hints
Remember, to add the second addend, count forward by small amounts.
Add each number (10 and 7) to fully add 17. Use the number line to guide you.Solution
The number line starts with the larger addend (40) on the left. Next, we count forward by small amounts of the second addend: 40 +10 = 50, 50 + 7 = 57.
The answer to 40 + 17 = 57
Create your own number lines to solve.Hints
Remember to break the second addend into small amounts. For example: 24 + 14. 14 is the smaller addend. We can break it into +10 and +4.
Remember, you have solved the problem once you have added the entire second addend.Solution
By making our own number lines, we can solve the equations:
24 + 14 = 38
45 + 18 = 63
58 + 13 = 71