- a jean jacket is normally $39.99, but it's 40% off
- a corduroy jacket is normally $44.99, but it's 30% off
- a pair of boots are $79.99, but they're 25% off
Grocery shopping is also a good time to teach rounding. If I'm in a store that accepts cash only, I still have my children keep track of my total. I'm not going to ask them to do the exact math for every single item, so I have them round the prices to the nearest dollar, so they can easily keep track in their heads.
The point is that math in the real world is way more interesting than worksheets. What ideas have worked for your families?