Mathematical Operations Flashcards

All 5 cards in this deck

What do the symbols $<$ and $>$ mean?

$<$ means 'less than', $>$ means 'greater than'.
e.g. $14 < 21$

What do the symbols $\le$, $\ge$ and $\ne$ mean?

'Less than or equal to', 'greater than or equal to', 'not equal to'.

What is the inverse operation of multiplying by 6?

Dividing by 6.

True or false? $8 - 3$ gives the same answer as $3 - 8$.

False. Addition and multiplication can be done in any order, but subtraction and division cannot.

What are the steps to check a subtraction using the inverse operation?

e.g. check $645 - 500 = 145$

1. Take your answer: $145$
2. Add back the number you subtracted: $145 + 500$
3. It should give the number you started with: $645$ ✓