Greta had 12 candy bars and Sean had 4 candy bars.
Greta ate 1 of her candy bars and gave 3 of her candy bars to Sean.
How many more candy bars did Greta have than Sean then?

Try to imagine a number line in your head.
What number is as far away from 4 as it is from 18?

Wendy the worm spotted a tasty treat 15 inches above her on the big oak tree.
She crawled up 9 inches but slipped and fell back 3 inches.
She started up again and crawled only 7 inches.
How far was Wendy from her treat then?

Nicky found a magic money machine.
The machine will double his coins and add 1 more.
Nicky put in some pennies.
He got 15 pennies out of the machine.
How many pennies did Nicky put in at first?

Lauren and Cathy had the same number of pencils.
Lauren gave 3 of her pencils to Cathy.
How many more pencils did Cathy have than Lauren then?