🔢 Part 1: Addition with Regrouping

1. Solve these addition problems using regrouping. Show your working in the boxes below:

a) 267 + 145 = _______

b) 389 + 276 = _______

c) 158 + 367 = _______

2. Circle the problems below that will need regrouping:

234 + 125

147 + 286

302 + 241

456 + 378

➖ Part 2: Subtraction with Regrouping

3. Solve these subtraction problems using regrouping. Show your working in the boxes below:

a) 352 - 178 = _______

b) 425 - 267 = _______

c) 503 - 249 = _______

4. Fill in the missing numbers to complete the regrouping:

In 425 - 167, we cannot take 7 ones from 5 ones.

So we regroup 1 ten into _____ ones.

Now we have _____ ones and can subtract 7 ones to get _____ ones.

5. Use addition to check your subtraction answers from Question 3:

a) Check 352 - 178: _______ + 178 = 352

b) Check 425 - 267: _______ + 267 = 425

6. Solve this word problem using regrouping:

Sarah had $347 in her savings account. She spent $189 on a new bicycle. How much money does she have left?

Answer: Sarah has $_______ left.

7. Explain in your own words why regrouping is useful when adding and subtracting: