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Make a Number Line to Add — Let's Practise!

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Basics on the topic Make a Number Line to Add — Let's Practise!

Let's practise adding on a number line with Razzi!

Make a Number Line to Add — Let's Practise! exercise

Would you like to apply the knowledge you’ve learnt? You can review and practice it with the tasks for the video Make a Number Line to Add — Let's Practise!.
  • 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 forwards by the second number, what do we need to do?

    Solution

    The steps to using a number line to solve a problem are:

    1. Draw a number line.
    2. Put the larger number on the left.
    3. Count forwards by small amounts of the second number.
    4. Solve the equation.

  • Show how to add using the number line.

    Hints

    Remember, put the larger number on the left.

    Partition 16 into tens and ones. First add the tens, then the ones.

    What numbers will go on the number line when we add 10 and 6?

    Solution

    This is how we use a number line to add.

    The larger number 76 is on the left. The smaller number 16 is partitioned into smaller 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 number on the left. Which number is larger?

    Once the larger number is on the left, count forwards by small amounts of the second number. Fill in the blanks as you count on.

    Solution

    53 + 32 = 85.

    We start at the larger number, 53. From there, we add the smaller number 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 number on the left.

    To fill in the numbers on the top, think about how to partition 12 into tens and ones.

    The parts of 12 are filled in on the number line. Can you place the sums below?

    Solution

    64 + 12 = 76.

    First, we put the larger number 64 on the left. Then, we partition 12 into smaller amounts (10 + 2). 64 + 10 = 74, 74 + 2 = 76.

  • Complete the number line.

    Hints

    Remember, when we add 17, we are adding 10 and then 7.

    Add 10 first and write the total on the number line, then add 7.

    Solution

    • The number line starts with the larger number (40) on the left.
    • We count forwards by small amounts of the second number.
    • 17 has been partitioned into 10 and 7.
    • 40 +10 = 50, 50 + 7 = 57.
    The answer to 40 + 17 = 57

  • Create your own number lines to solve.

    Hints

    Remember to partition the second number into small amounts. For example: 24 + 14. 14 is the smaller number. We can partition it into +10 and +4.

    Remember, you have solved the problem once you have added the entire second number.

    Solution

    By making our own number lines, we can solve the equations:

    24 + 14 = 38

    45 + 18 = 63

    58 + 13 = 71