Add and Subtract 3-Digit Numbers and 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 3-digit numbers and multiples of 10 worksheet. As the worksheet uses a horizontal format, it allows for more creativity when it comes to how the student solves the problem. In contrast, in the vertical format, students usually employ the standard method to solve.