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Additive Angles — Let's Practise!

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Basics on the topic Additive Angles — Let's Practise!

Today we are practising additive angles with Razzi! This video contains examples to help you further practise and grow confident in this area.

Transcript Additive Angles — Let's Practise!

Razzi says get these items ready because today we're going to practise additive angles. It's time to begin! What is the total angle made by these adjacent angles? Pause the video to work on the problem and press play when you are ready to see the solution! Forty-eight plus thirty-nine equals eighty-seven. Did you also get eighty-seven degrees? Let's tackle the next problem! What is the total angle made by these adjacent angles? Pause the video to work on the problem and press play when you are ready to see the solution! Forty-two plus thirty-two plus seventy-two equals one hundred and forty-six. Did you also get one hundred and forty-six degrees? Let's try another. What is the measurement of the missing angle? Pause the video to work on the problem and press play when you are ready to see the solution! One hundred and thirty-five minus fifty-four equals eighty-one. Did you also get eighty-one degrees? Let's tackle the final problem! What is the measurement of the missing angle? Pause the video to work on the problem and press play when you are ready to see the solution! Thirty-six plus fifty plus forty-seven is one hundred and thirty-three. One hundred and eighty minus one hundred and thirty-three equals forty-seven. Did you also get forty-seven degrees ? Razzi had so much fun practising with you today! See you next time!

1 comment
1 comment
  1. this is a fun way to learn 😊

    From Lilly, 10 months ago

Additive Angles — 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 Additive Angles — Let's Practise! .
  • Find the combined angles.

    Hints

    In this example, to find the combined angles we must add 20 + 45.

    When adding the two angles, try adding the ones first and then the tens.

    Solution
    1. 31° + 52° = 83°
    2. 39° + 47° = 86°
    3. 47° + 71° = 118°
    4. 52° + 32° = 84°
  • What is the total of the combined angles?

    Hints

    To find the total, all three angles must be added together.

    Try partitioning each number and adding the tens and ones separately.

    First add two angles together, then add the third angle onto this total.

    Solution

    26° + 52° + 32° = 110°

  • What is the total of the two angles?

    Hints

    First, find the value of the two angles that must be added together.

    Angle (a) is 36° and angle (b) is 42°. Now we need to add these together to find the combined amount.

    Solution

    36° + 42° = 78°.

  • What do the angles total?

    Hints

    There are three angles that we need to add together.

    Try adding the tens and ones separately. For example, first add 70 + 60 + 20.

    Solution

    75° + 60° + 24° = 159°.

    We could solve this by first adding the tens, 70 + 60 + 20 = 150, then adding the ones, 5 + 0 + 4 = 9, before combining these two answers together. 150 + 9 = 159°.

  • What is the sum of the combined angles?

    Hints

    To find the combined angles, the two separate angles need to be added together.

    What is 38 + 22?

    Try adding the ones first and then the tens.

    Solution

    38° + 22° = 60°

  • Find the missing angle.

    Hints

    We know that (a) + (b) + (c) = 152. What is the total of (a) + (c)?

    (a) + (c) or 35° + 78° = 113°. What do we need to do next to find angle (b)?

    152 - 113 will give the answer to the missing angle (b).

    Solution
    • (a) + (b) + (c) = 152°
    • (a) + (c) = 113°
    • 152 - 113 = 39°
    • We can check this by adding all three angles together: 35 + 39 + 78 = 152.