Step 4 / 8

Add the ones

★★★Not the suggested order

In column math, start with the ones.

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Example

Work out the ones column. What do you get?

Answer: 5

Steps in this unit · Two-digit addition

1 2 3 4 5 6 7 8

← Tens plus tens Add the tens →

Two-digit addition · Numbers & Operations

Add the ones, then the tens. Solve no-carry addition in columns too.

In column math, start with the ones.

This is step 4 of unit 30, “Two-digit addition”, 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.