Subtraction

Subtraction is when you start with a bigger number, and take the smaller number away. Sometimes we say ‘minus’ if we read a subtraction number sentence. We have been learning two ways of solving subtraction problems.

One way is to use concrete materials like counters to make the bigger number. From that group, you physically take the smaller number away. Then you count how many are left in the first group.

The second way we have used is to count backwards. You can do this with concrete materials or a number line until you get the hang of it, then you can do it in your head. You say the big number and ‘put it in your head’. Then you think of the smaller number and count backwards that many times. It’s hard to remember you’re counting the ‘jumps’ backwards, not counting back until you get to that number!

• Rabbit Takeaway
• Subtraction Machine
• Conveyer Belt Subtraction (British money symbol)