Going Down and Up in 10's and 100's | Year 3 Maths Resources

What you need to know

Things to remember:

  • Numbers can be split into smaller ones to make them more manageable.
  • When adding or subtracting by 10, the 10s go up or down by 1.
  • When adding 10 to a number in the 90s, the 100s go up by 1 and the tens become 0.
  • When adding or subtracting 100, the 100s go up or down by 1.
  • When adding 100 to a number in the 900s, we get a 1000 and the hundreds become 0.

We can split up a number into units, 10s, and 100s.

237= 200 + 30 + 7


Let’s try using this in a question.



Example Questions

Question 1: Add the following numbers



Remember, we can split it up.



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