Find and Fix the Error

Focus: Two Digits + One Digit: No Regrouping. Use the worked example and teaching sequence below to explain the reasoning before independent practice.

Use New Numbers to make another set. Choose Worksheet or Answer Key, then use the worksheet’s Print button.

Teaching Notes

Focus: Two Digits + One Digit: No Regrouping. Use the worked example and teaching sequence below to explain the reasoning before independent practice.

Before You Begin

Read the numbers and identify the operation.

Teaching Steps for Parents and Teachers

For an error-correction problem, find the first incorrect step. Explain why it is wrong, then recompute all later steps.
Align corresponding place values.
Work from the smallest place to the greatest place.
This worksheet uses calculations without regrouping. Record each place value carefully.
Check the result using the inverse operation.

Worked Examples

Evaluate 32+5.

Place value 1: 2 + 5 = 7. Write 7.
Place value 10: 3 + 0 = 3. Write 3.

Answer: 37

Common Mistakes and How to Help

Digits in different places have been combined.

Point to each place value before calculating, and keep the digits aligned.

Questions to Check Understanding

Subtract one addend from the sum. The result should equal the other addend.
Which step explains your answer?
Can you apply the same reasoning when the numbers change?

Practice Advice

Work through the example together. Ask the learner to explain the first two problems, then try three independently. Review the first incorrect step before assigning more practice.

Next Practice

Use New Numbers to practice the same skill with different values.
If the learner needs help, return to the example and model each step before trying again.