Question

carrie has 140 coins. she has 10 times as many coins as she had last month. how many coins did carrie have last month?

Answer 1

14.

The easiest trick to this is to add zeroes after the number! 14 x 10? Add 1 zero! 14 x 100? Add 2 zeroes!

1.4 x 10? 14.0!

Answer 2

Last month, she had 140 divided by 10, or 14 coins.