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How many to make 10?

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9 needs 1 more to make 10.

Cloud Bridge · Learn first

Example

What do you add to 8 to make 10?

Answer: 2

Steps in this unit · Make 10 to add

1 2 3 4 5

← Make 10 first Split the second number →

Make 10 to add · Numbers & Operations

For sums over 10 like 9 + 3, split one number to make 10 first. This is the idea behind carrying.

9 needs 1 more to make 10.

This is step 1 of unit 40, “Make 10 to add”, in Stage 2: Numbers to 100, carrying and borrowing (ages 7–8). 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.