Step 1 / 3

Count the tens

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Three tens make 30.

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Example

5 tens. What number is that?

Answer: 50

Steps in this unit · Counting in tens

1 2 3

← Say the teens (2)Say the tens (1) →

Counting in tens · Numbers & Operations

See how many tens there are to know 20, 30, 40 and 50, and learn their names.

Three tens make 30.

This is step 1 of unit 19, “Counting in tens”, 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.