Subject: Subtraction

Subtraction in the Air #27

Subtraction in the Air #26

Subtraction in the Air #29

Subtraction in the Air #28

Underwater Subtraction #27

Underwater Subtraction #25

Underwater Subtraction #17

Subtraction in the Jungle #3

Subtraction in the Jungle #1

Underwater Subtraction #14

Underwater Subtraction #9

Know All About Numbers: The Missing Sign

Subtraction Equations

Subtraction Fact Fill-In #4

Subtraction Fact Fill-In #3

Solving Subtraction Equations

Subtraction Number Crunching #1

Practice Front-End Estimation