**Year 3 Maths – Find 10 or 100 More or Less than a given Number** *KS2 Revision*

## KS2 SATs Flash Cards

- Over 100 KS2 Exam Style questions and answers
- Arithmetic and reasoning sections covered
- Exact same format as the exam

## 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

682=600+80+2

Let’s try using this in a question.

325+100=300+20+5+100=300+100+20+5=400+20+5=425

187-10=100+80+7-10=100+80-10+7=100+70+7=177

# Example Questions

**Question 1: **Add the following numbers

678-100

**Question 1: **Add the following numbers

678-100

**Question 2: **Add the following numbers

133+10

Remember, we can split it up.

133+10=100+30+3+10=100+30+10+3=100+40+3=143