Add Two 4-Digit Numbers without Regrouping: Missing Numbers Worksheet

This worksheet challenges young mathematicians to hone their math skills by solving a set of problems on adding two 4-digit numbers without regrouping. 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 two 4-digit numbers without regrouping worksheet.