Mental Math Tricks, Round Up, Then Subtract To Find a Sum

I show you how to add numbers mentally by rounding them up to easy and compatible numbers, then subtracting the excess amount. Mental addition is useful when shopping, or when we just need a quick sum.
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[@sabiasulthana1104]

Thank you dear, you are really a awesome teaher 🥰

[@jasmineshank1830]

My daughter had mental math last week. I couldn’t for the life of me comprehend and break this down for her. I even had a group of coworkers try to help me comprehend. We were all puzzled. It still feels like a bit much.

[@JoAnnsSchool]

It can be daunting. But, it's valuable! For K through 3rd grade, you can use 1 and 2 digit numbers to practice, like 9 + 9, 9 + 8, 19 + 6, etc. For 4th grade and above, you can practice with 2 and 3 digit numbers like 29 + 6, 299 + 99, etc. Let me know if you get stuck and need guidance. :-)