Add 10 to a 3-Digit Number: Missing Digits Worksheet

This worksheet strengthens students' accuracy and strategic flexibility while they add 10 to a 3-digit number. If an addend is missing, students use the count-on method or the relationship between addition and subtraction to determine the missing number. Also, they add the addends if the missing number is the sum of the addition sentence. This worksheet, add 10 to a 3-digit number, offers a tonne of practice with this idea.