Add, Subtract, Multiply and Divide Decimals

Which of the following operations require you to line up your decimals?

• Addition  $+$  

• Subtraction  $-$  

• Multiplication $\times$  

• Division  $\div$   

Tags

CCSS.5.NBT.B.7

Which of the following operations DO NOT require you to line up your decimals?

• Addition  $+$  

• Subtraction  $-$  

• Multiplication  $\times$  

• Division  $\div$  

Tags

CCSS.5.NBT.B.7

When dividing, which number CANNOT be a decimal when solving?

• Quotient (the answer)

• Divisor (the second number/outside number)

• Dividend (the first number/inside number)

• It doesn't matter; any of them can be a decimal

Tags

CCSS.7.NS.A.2

CCSS.7.NS.A.3

7.13 x 5.5 

• 39.215
• 3.9215
• 392.15
• 3921.5

Tags

CCSS.5.NBT.A.2

CCSS.5.NBT.B.7

Calculate
1.08÷4

• 2.7
• 0.27
• 2.07
• .20

Tags

CCSS.5.NBT.B.7

Calculate
5.75÷0.25

• 0.23
• 2.3
• 2.03
• 23

Tags

CCSS.6.NS.B.3

3.3 + 2.22=

• 5.52
• 5.55
• 5.77
• 5.4

Tags

CCSS.5.NBT.B.7

8.4 - 3.03=

• 5.33
• 5.37
• 5.43
• 4.33

Tags

CCSS.5.NBT.A.3

CCSS.5.NBT.B.7

Once the numbers are lined up in a multiplication problem, how do I know where my decimal is placed in my answer?

• Bring the decimal straight down
• There is no decimal
• Count how many numbers are behind all decimals in the problem
• Move the decimal 2 spaces from the front

Tags

CCSS.5.NBT.A.2

CCSS.5.NBT.B.7

Solve: 28.53 + 34.921

• 61.21

• 63.451

• 64.501

• 63.381

Tags

CCSS.5.NBT.A.3

CCSS.5.NBT.B.7