Demystifying - Column addition

Goal

Add integers and decimals in aligned columns, regroup when a column reaches ten, and keep money or measure units with the total.

Practise adding in columns

For the full explanation, return to the lesson on column addition.

Aligning place valuesQuestion 1 of 12
  1. 1Aligning place values
  2. 2Regrouping
  3. 3Money and measures

Add the two numbers

Calculate the sum.

Keep building

Next lesson

Column subtraction

Subtract in columns with exchange, lining up decimal points and place values.

 Next practice

Column subtraction

Practise subtraction with aligned decimals and carefully recorded exchanges.