Subtraction: The Inverse of Addition

This series of interactive excel sheets look at a variety of subtraction methods and questions. Answers can be checked each time and new questions generated at the click of a button.

The first sheet looks at addition and multiplication of multiples of either 10 or 100. The second sheet contains a mix of eight addition and subtraction questions involving two-digit numbers. The third sheet generates a series of multiple choice questions involving addition of the number 11. Clues can also be revealed.

The following two sheets explore patterns in a sequence of addition or subtraction sums. Students are to complete the missing values in each row.

The sixth interactive sheet invites students to collect all the addition facts that make 14 by completing the missing value in each sum. The following sheet repeats this when talking away from 15.

The final interactive sheet contains a set of four addition questions and four associated subtraction questions. Students have to complete the blanks in each statement.

Note:
This program was designed to be viewed on a screen with a resolution of 1024 x 768. Users may have to adjust the resolution of their screen for the pages to display as was originally intended. The program uses macros which need to be enabled on the users' machine.