Add and subtract 2-digit and 1-digit numbers

Learning focus

Learn about adding and subtracting a 2-digit number and a 1-digit number (for example 12 + 7 = 19 or 45 + 3 = 48).

This lesson includes:

  • one learning summary
  • two activities

Learn

Using two-digit numbers

Read these revision pages from Collins to learn some helpful tricks for adding and subtracting 1 and 2-digit numbers. Why not make some notes of your own to help you remember?

Using two-digit numbers

Adding quiz

Play the audio clip below. Grab a piece of paper and a pencil first - write down the answers quickly - you only have 10 seconds to answer each one!

Finished? Check your answers here. The questions are also written out, if you can't listen to the quiz out loud.

Practise

Activity 1

Have a go at the worksheet below. Print it out or write the answers on a piece of paper.

Missing number problems

Check here for the answer sheet

Activity 2

Roll a number

You will need:

  • a dice
  • a tray and masking tape, or a big piece of paper and a pen, or chalk and somewhere outside to draw on - ask permission!

Instructions:

  1. Draw some boxes or make them with tape on your tray
  2. Add a 2-digit number to each box
  3. Roll the dice onto the squares
  4. Add the number and the number on the die
  5. Keep rolling!

Now try subtracting the number on the die from the 2-digit number.

Activity from Gratnells Learning Rooms

Play

Play Guardians: Defenders of Mathematica to learn more about this topic and test your skills.

Guardians: Defenders of Mathematica

There's more to learn

Have a look at these other resources.

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