Copyright © Ed2Net Learning, Inc.1 Fact Families: Add-Subtract Relationship Grade 2

Copyright © Ed2Net Learning, Inc. 2 Warm Up Subtract:  =  3 – 0 =  9 – 2 =  6 – 3 =

Copyright © Ed2Net Learning, Inc. 3 Subtract to Compare You can subtract to compare two sets. There are 8. There are 3. How many fewer are there? ___ - ___ = ___ There are ___ fewer than There are 5 more blue cubes than yellow cubes

Copyright © Ed2Net Learning, Inc. 4 Your Turn! Use cubes. Complete the number sentence. 96  How many more are there?  __ - __ = __ 74  How many fewer are there?  __ - __ = __

Copyright © Ed2Net Learning, Inc. 5 Try This! Fiona picks 8 pink flowers and 5 yellow flowers. How many more pink flowers than yellow flowers does she pick?

Copyright © Ed2Net Learning, Inc. 6 Use Addition to Subtract Find 11 – 8. Use a related addition fact to find the difference. 8 + __ = – 8 = __ 3 3 Related facts use the same three numbers.

Copyright © Ed2Net Learning, Inc. 7 Try This! Use related addition facts to find the difference = __ 10 – 5 = __ = __ 11 – 5 = __

Copyright © Ed2Net Learning, Inc. 8 Number Expressions Use addition and subtraction to name the same number.  These are names for

Copyright © Ed2Net Learning, Inc. 9 Number Expressions These are same names for 7.   11 – 4  12 – 5  7 - 0

Copyright © Ed2Net Learning, Inc. 10 Try This! Circle the names for the number The sums and differences should equal the number shown.

Copyright © Ed2Net Learning, Inc. 11 Some more!! Write names for the number

Copyright © Ed2Net Learning, Inc. 12 Fact Families A fact family is a set of related facts. A fact family has the same two parts and the same whole.  This fact family uses the numbers 17, 8, and 9.  17 is the whole, 8 and 9 are the parts. 17 Whole 17 Part 8 Part 9 Fact Family = = = = 9

Copyright © Ed2Net Learning, Inc. 13 Fact Families Fact Family  = 15  = 15  15 – 7 = 8  15 – 8 = 7 Whole 15 Part 8 Part 7 All four facts use the same numbers; two are addition and two are subtraction; the order of numbers is different

Copyright © Ed2Net Learning, Inc. 14 Your Turn! Complete the number sentence for the fact family.  = __  = __  11 – 5 = __  11 – 6 = __  = __  = __  9 – 7 = __  9 – 2 = __ Whole 11 Part 6 Part 5 Whole 9 Part 7 Part 2

Copyright © Ed2Net Learning, Inc. 15 Break!!!

Copyright © Ed2Net Learning, Inc. 16

Copyright © Ed2Net Learning, Inc. 17 Word Problem There are 10 red balloons and 4 green balloons. How many more red balloons than green balloons are there?

Copyright © Ed2Net Learning, Inc. 18 Word Problem There are 7 red apples and 3 green apples in a basket. How many fewer apples are there?

Copyright © Ed2Net Learning, Inc. 19 Word Problem Juan has 8 apples. Benny has 12 pieces of fruit, he has 4 bananas and the rest are apples. Rudy has 7 apples. Which two boys have the same number of apples?

Copyright © Ed2Net Learning, Inc. 20 Word Problem Laura has 8 daisy stickers. She also has 6 rose stickers. How many stickers does she have in all? If Laura gives 6 stickers to her friend, how many will she have left?

Copyright © Ed2Net Learning, Inc. 21 Assessment 1. Subtract 1. 6 – – 5 2. Follow the rule. Complete the chart. Subtract ? 7? 6?

Copyright © Ed2Net Learning, Inc. 22 Assessment 3. 7 and 1. How many more are there? 4. 6 and 3. How many fewer are there? 5. Add or subtract = __ 13 – 5 = __ 6. Add or subtract = __ 11 – 4 = __ 7. Write names for the number Write names for the number Complete the fact family = Complete the fact family = 12

Copyright © Ed2Net Learning, Inc. 23 Review You can subtract to compare two sets. Use a related addition fact to find the difference. Use addition and subtraction to name the same number. A fact family is a set of related facts.

Copyright © Ed2Net Learning, Inc. 24 Great Job! You learned a lot today! Remember to do the practice worksheets!!