Single-digit Addition *Error Type 1
What does the equal sign(=) mean? Do you have to add the numbers in the order given? Is it true that the more numbers you add the bigger the total is?
Category Mistake Detective
Multi-digit Addition Error Type 3
Carrying to the right--when the sum of each digit exceeds 10, the value of the resulting tens digit or hundreds digit is not properly combined with the tens digit or hundreds digit.
Multi-digit Addition Error Type 2
Making up extra digit- when the sum of two single digits exceeds 10, the value of the resulting ten's digit is improperly combined with the sum of the tens digits.
Multi-digit Addition Error Type 1
Ignoring place value-when multi-digit numbers are added, each digit is added without its corresponding place value.