Add and Subtract Multiples of 10: Missing Numbers Worksheet

Students use the count on or count back strategy or the relationship between addition and subtraction to find the missing number in this add and subtract multiples of 10 worksheet. In this worksheet, students practice solving problems written in the horizontal format. How numbers are laid out in a problem affects the method a student employs to solve it. Therefore to develop actual fluency and mastery of multiple strategies, students must practice different formats.