Intermediate
40 mins
Teacher/Student led
+65 XP
Teacher-led from the board. Pupils do not need a device, but can follow on one.

Count Up to Take Away, When the Numbers Are Close

In this maths lesson you will practise counting up to solve close take-aways on the number line. You will see that this method needs fewer jumps than counting back when the numbers are near each other.

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    Number line jumps
    Number line jumps

    1 - Getting Started ~3 mins

    Illustration for Getting StartedThe blitz is over. Our team scored 12 points and the visitors scored 9. How far apart were the teams? Was it a close match?

    2 - Watch and Notice ~8 mins

    Watch 12 − 9 done two ways on the number line. The long way first, then the short way. Which one needs fewer jumps?

    We made three little jumps. 12 − 9 = 3. The jumps are the answer.

    Close numbers sit near each other on the line, so the gap is small. Now two more close take-aways. Predict how many jumps before each one.

    3 - Try It Together ~8 mins

    We already saw that 12 − 9 needs three jumps up. Now try a new one: 16 − 13. Stand on the smaller number and count up. How many jumps? The jumps are the answer.

    Count up for 16 − 13

    4 - Write the Take-away in Your Copy ~2 mins

    COPYBOOK MOMENT

    In your maths copy, write 12 − 9 = 3.

    5 - Class Challenge ~10 mins

    Today we count up to solve these: 10 − 8, then 11 − 9, then 13 − 11, then 15 − 12. Stand on the smaller number and jump up one step at a time — how many jumps to the bigger one?

    Count up to take away

    Pupil practice
    Module 3 · Subtraction Within 20: Take Away and Difference Number
    Lesson 36 · Count Up to Take Away, When the Numbers Are Close
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