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Add and Subtract Mentally

Dr. Riley

Created on October 4, 2025

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Transcript

Add and Subtract Mentally

BEFORE YOU START

Print the assignment using this link: link.Complete the work on paper and then type your answer in the boxes on the screen to check it. If you get it correct, write a small check mark. If you get it incorrect, write a small x and try again. Once you get it correct, write a short sentence explaining what you learned from your mistake. Scan and turn in your work.

125 - 27
= 125 -
125 + 27
= 125 +
617 + 12
= 617 +
789 + 76
= 789 +
789 - 76
= 789 -