Download
understanding how addition and subtraction relate to one another sol 2 10 n.
Skip this Video
Loading SlideShow in 5 Seconds..
Understanding how addition and subtraction relate to one another. SOL 2.10 PowerPoint Presentation
Download Presentation
Understanding how addition and subtraction relate to one another. SOL 2.10

Understanding how addition and subtraction relate to one another. SOL 2.10

103 Vues Download Presentation
Télécharger la présentation

Understanding how addition and subtraction relate to one another. SOL 2.10

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

  1. Understanding how addition and subtraction relate to one another.SOL 2.10 Grade 2 Created by; Kim Smith

  2. 25 For each addition fact there is a related subtraction fact? • No • I don’t know • Who cares • Yes

  3. 25 When determining a missing number do we have to add or subtract? • No • Yes • I don’t know • Maybe

  4. 25 What are the missing numbers in this sentence?3+__=5 or __+2=5 • 3,1 • 2,3 • 1,3 • 5,5

  5. 25 What are the missing numbers in this sentence?5-__=3 or 5-2=__ • 3,3 • 1,1 • 2,3 • 3,2

  6. 25 What are the missing numbers in this sentence?6+__=10 or __+6=10 • 3,3 • 2,2 • 4,4 • 6,6

  7. 25 What are the missing numbers in this sentence?8-__=2 or 8-6=___ • 6,2 • 3,1 • 8,8 • 8,2

  8. 25 What are the missing numbers in this sentence?5-__=1 or 4+1=__ • 4,5 • 3,2 • 3,3 • 4,4

  9. 25 What are the related facts for this addition problem?3 + 4 =7 • 7-2=5 and 7-5=2 • 7-3=4 and 7-4=3 • 7-6=1 and 7-1=6 • 3-4=7 and 4-3=7

  10. 25 What are the related facts for this addition problem?6+5=11 • 11-6=6, 11+5=16 • 11-5=6, 11-6=5 • 11+11=22, 11+22=33 • 11-5=6, 11-6=6

  11. 25 What are the related facts for this subtraction problem?15-6=9 • 9+6=15, 15-9=6 • 15-6=9, 15+6=21 • 15-9=6, 15-6=9 • 15+15=6, 15+15=30

  12. 25 What are fact families? • When all the numbers are related • When all the numbers are different • When you only use addition • When you only use subtraction

  13. 25 What are the fact families for10+3? • 10+3=13,3+10=13, 13-10=3,13-3=10 • 10+3=10,10+3=10,10-3=7, 10-7=3