Idea 8of 23Builds onMultiply each line, then add
Count up to make change
How much change should come back when you pay with a bill?
Today you'll discover
- how to count up from the cost
- how to add the hops
- why counting up avoids slips
Think first$12.94, paid with a $20 bill
What change should come back from the $20 bill?
Decide first, then press Next. Follow the hops from left to right.
A box with $12.94 at the left and a box with $20.00 at the right. A curved hop of 6¢ reaches a new box, $13.00, then a hop of $7.00 reaches $20.00. Along the bottom: 6¢ + $7.00 = $7.06 change. Then $33.90 paid with $50: hops of 10¢, $6.00 and $10.00 make $16.10. The last step asks about $8.45 paid with $10.
See the whole ideathe big idea and the key word, in one place
The big idea
To find change, count up from the cost to the money paid, then add the hops.
Like a cashierCount coins into the hand while saying the totals: $12.94 … $13 … $20. The coins and bills you counted are the change.
Easy to get wrongHop to the next whole dollar first. From 94¢ that is 6¢, because 94 + 6 = 100.
Key word
- change
- the money given back when you pay more than the cost: paid − cost
Ready to use it?
- Find the change by counting up.
- Check change against an estimate.