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Mentally Add Three Numbers (within 20)

Grade Levels
Common Core Standards
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Presentation (Powerpoint) File

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171 KB|56 pages
Product Description
This two-minute PowerPoint slideshow will help your students improve their mental addition skills, adding three numbers within 20 (Common Core 2.OA.B.2). Use this as a warm-up at the beginning of a whole-class math lesson or right before recess. Place it on student-computers for extra practice or as a rotation during Math Centers. 24 different addition problems. Each problem appears for five seconds and students say the answer aloud before the next slide appears with the answer. Quick. No prep. Just click and it runs itself (fully-automated). Take a look at the Preview to see some of the slides in this slideshow.

If you want more Addition and Subtraction PowerPoint slideshows, then here are the rest in this series:

Add 10 to Two-digit Numbers
Add and Subtract within 20
Add Multiples of 10 (within 100)
Add Multiples of 10 (within 1000)
Mentally Add 10 to a Given Number
Mentally Add 100 to a Given Number
Mentally Add Three Numbers (within 20)
Subtract 10 from Multiples of 10
Subtract 10 from Two-digit Numbers
Subtract Multiples of 10 (within 100)
Subtract Multiples of 10 (within 1000)
Subtracting Hundreds (within 1000)
Two Minute Addition
Two Minute Multiplication
Two Minute Subtraction
Total Pages
Answer Key
Teaching Duration
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