NUMBER LINE JUMPS

Use number lines to visualize jumps forward and backward for subtraction.

L2L3

CS.N.1.2·Ordering natural numbers 0–100(I)CS.N.1.5·Performing subtraction with numbers 0–100(I)

Section 1 / 3

JUMPING BACK IN CHUNKS

For larger subtractions, don't count back one by one. Instead, make strategic jumps: subtract tens first, then ones. For 43-18: jump back 10 from 43 to get 33, then jump back 8 to get 25.

43 - 18

1Start at 43

2Jump back 10: 33

3Jump back 8: 25

= 25

LEADER TIP

Empty number lines let students show their own thinking. Encourage jumps of 10 first, then adjust.

BEFORE THIS LESSON, TRY

Counting Back

PRACTICE WITH THESE GAMES

Subtraction Table

Subtraction Memory

Fast Subtraction

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CONTINUE WITH:

Regrouping (Borrowing)

NUMBER LINE JUMPS

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NUMBER LINE JUMPS