Step 2 / 4

With carrying

★★★Not the suggested order

For 8 + 7, add 2 to make 10, then add the other 5: 15.

Cloud Bridge · Learn first

Example

Solve it.

8 + 3 = ?

Answer: 11

Steps in this unit · Add within 20

1 2 3 4

← No carrying Add three numbers →

Add within 20 · Numbers & Operations

From no-carry to carrying sums, adding three numbers, and missing addends.

For 8 + 7, add 2 to make 10, then add the other 5: 15.

This is step 2 of unit 1, “Add within 20”, in Stage 2: Carrying, borrowing and numbers to 100 (ages 8). A round has 10 problems; 90% or better earns three stars. Everything is free with no sign-up, and your stars and XP are saved on this device.