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Number Line Addition Practice

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Number Line Addition Practice

At a stargazing night, Hugo, Freya and Tane are adding distances, points and counts. Use number-line jumps to add. You can split the second number into hundreds, tens and ones, or use a friendly-number jump. Show your jumps and write each answer.

Warm-up: launch the jumps

Start at the first number and jump forward by the amount being added.

1.Hugo spots 34 stars in one part of the sky and 28 in another. Find 34 + 28. Show two or more number-line jumps.

2.Freya records 57 points in the first stargazing game and earns 36 more. Find 57 + 36. Split 36 into tens and ones for your jumps.

Choose a clever route

Use a friendly number when it helps. Your jumps do not have to be the same as someone else’s.

3.Tane has counted 76 stars and then finds 19 more. Find 76 + 19. Try jumping to the next ten first.

4.The group has logged 128 minutes of observations and watches for 57 more minutes. Find 128 + 57 using tens and ones jumps.

5.A telescope catalogue lists 287 objects in one section and 146 in another. Find 287 + 146. Record each jump and the total.

6.The stargazing club collected 409 observation notes on Friday and 386 on Saturday. Find 409 + 386. Show hundreds, tens and ones jumps.

Solve and explain

Make sure your jumps match the numbers in the question. Check by estimating whether your answer is sensible.

7.There are 1,250 stars in one digital sky map and 375 in a second map. How many stars are shown altogether? Use a number line and write one sentence explaining your jumps.

8.A star chart contains 3,746 entries for the northern sky and 1,289 for the southern sky. Find the total number of entries. Choose jumps that are easy to track and check your total by estimating.

9.Puzzle: Freya starts at 246 on a number line. She jumps forward 50, then 7, then 100. What number does she land on? Write the matching addition equation.