Fact Families addition and subtraction

Rewrite this addition fact family as subtraction
2 + 3 = 5

• 3+ 2 = 5
• 5 - 3 = 2

Tags

CCSS.2.NBT.B.5

CCSS.2.NBT.B.7

Rewrite this number sentence as an addition sentence
5 - 2 = 3

• 3 + 2 = 5
• 5 - 3 = 2

Tags

CCSS.2.NBT.B.5

CCSS.2.NBT.B.9

True or False:
When changing an addition sentence to subtraction you start the sentence with the sum? example: 5-3 = 2

• True
• False

Tags

CCSS.2.NBT.B.5

CCSS.2.NBT.B.9

Rewrite this number sentence to show the inverse relationship
1/2 + 3/4 = N

• 3/4 - N = 1/2
• 1/2 - N = 3/4
• N - 1/2 = 3/4
• 3/4- 1/2 = N

Tags

CCSS.2.NBT.B.9

CCSS.2.OA.A.1

Rewrite this number sentence to show the inverse relationship:
2/3- 1/5 = N

• 1/5 + N= 2/3
• 2/3  + 1/5 = N
• 1/5 + 2/3 = N
• N + 2/3 = 1/5

Tags

CCSS.2.NBT.B.5

CCSS.2.OA.A.1

Sum means

• The total using addition
• The total using subtraction
• The total using multiplication
• The total using division

Tags

CCSS.2.NBT.B.5

CCSS.2.OA.A.1

Difference means: 

• The total using additon
• The total using subtraction
• The total using multiplication
• The total using division

Tags

CCSS.2.NBT.B.5

CCSS.2.NBT.B.7

CCSS.2.NBT.B.9

CCSS.2.OA.A.1

CCSS.2.OA.B.2

What is an important fact about fact families?

• They use only addition
• They cannot use fractions
• They reuse the same numbers to show the inverse relationship
• There are no important facts

Tags

CCSS.2.NBT.B.7

Find N:
1/2 + N = 6/2

• N= 3/2
• N = 4/2
• N = 5/2
• N = 6/2

Tags

CCSS.2.NBT.B.5

CCSS.2.OA.A.1

Rewrite 3 and 4/5 as a mixed number

• 17/3
• 19/4 
• 12/5
• 19/5

Tags

CCSS.4.NF.B.3