Subtracting from two-digit numbers A lively dance accompanies children singing a song about subtraction. The song explains what subtraction is and demonstrates how to subtract 10 from a larger 10s ...

How to subtract tens from two-digit numbers Bill and Bernie use labelled balloons to show subtractions of 10 from several two-digit numbers which are less than 100. Bernie thinks of a number and Bill ...

Students put all of their addition and subtraction skills together to solve equations. In this lesson, students put all of their addition and subtraction skills together to solve equations. Julia ...