You can write this as a number sentence. The sign for subtraction is '–'. 7 – 3 = 4 There are different words you can use for subtraction. You could say '7 take away 3 is 4', '7 subtract 3 ...

So subtraction can always be checked by adding. Check that 182 - 37 = 145 by doing the sum: 145 + 37 = 182 Look out for these words in problems: take away, difference, less than, minus ...