Add 4-Digit and 3-Digit Numbers without Regrouping: Missing Digits Worksheet

Can your young mathematician add 4-digit and 3-digit numbers without regrouping? That's exactly what they do here. Students use the count on strategy or the relationship between addition and subtraction to find the missing number in this worksheet. However, they do not need to regroup numbers to get to the answer in add 4-digit and 3-digit numbers without regrouping worksheet.