LEARN · PRACTISE · DISCOVER

Make a Math Story Project

Read at your own pace. Try the practice, then continue your course.

Review your strategies by making a short math story with one addition fact and one subtraction fact.

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THE CURIOSI · EXPLORE & TRY

Explore the picture together. Open each numbered card for a little help.

Look at each counter or step. Open the explanations to connect the picture and the equation.

18 birds at first

Begin with eight birds.

25 arrive: 13 birds

Add five birds that arrive: 8 + 5 = 13.

34 leave: 9 stay

Then four fly away: 13 − 4 = 9 birds stay. Use thirteen as the start of the second step.

Count carefully and explain your steps. Use objects or fingers whenever they help.

Show the final number of birds: 8 + 5, then take away 4. Tap a box to add a counter; tap it again to remove it. Each frame holds ten.

0 counters selected.

Choose one answer for each question, then check. Practice results stay on this page and do not change course completion.

1. Eight birds are joined by five. How many before any leave? 9 12 13

2. Then four of the thirteen birds leave. How many stay? 4 9 17

3. Which check fits the second step? 9 + 4 = 13 8 + 4 = 13 13 + 4 = 9

Read the answer explanations

Ask an adult to read the instructions with you. Use large safe counters or drawings; take a break whenever you need one.