Adding Decimals: Techniques for Tenths and Hundredths

The video tutorial demonstrates solving a word problem using place value chips, pictorial models, and an algorithmic approach. It begins with a concrete model using place value chips to represent the amounts collected by Haley and Mary Helen. The tutorial then transitions to a pictorial model using a place value chart and concludes with an algorithmic solution. Each method consistently results in the same total amount, $55.99, illustrating the transition from concrete to abstract understanding.

What is the first step in solving the word problem using place value chips?

• Counting the chips

• Writing the number sentence

• Building a concrete model

• Drawing a place value chart

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CCSS.2.NBT.B.7

How many tens disks are used to represent Haley's amount?

• Zero

• Five

• Four

• One

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CCSS.1.NBT.B.2B

CCSS.1.NBT.B.2C

What is the total number of hundredths disks after combining both amounts?

• Ten

• Seven

• Nine

• Eight

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CCSS.5.NBT.B.7

How many ones disks are there in total after combining both amounts?

• Seven

• Five

• Six

• Four

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CCSS.2.OA.A.1

What color circles are used to represent Haley's amount in the pictorial model?

• Red

• Yellow

• Blue

• Green

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CCSS.2.OA.A.1

How many green circles are drawn in the ones place for Mary Helen's amount?

• Three

• Four

• Five

• Six

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CCSS.1.NBT.B.2B

CCSS.1.NBT.B.2C

What is the total value obtained after adding the pictorial models?

• $55.98

• $54.99

• $56.00

• $55.99

Tags

CCSS.5.NBT.B.7

What is the first column to be added when using the algorithm?

• Tens

• Hundredths

• Tenths

• Ones

Tags

CCSS.5.NBT.B.7

What is the sum of the tenths column in the algorithm?

• Seven tenths

• Eight tenths

• Ten tenths

• Nine tenths

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CCSS.5.NBT.B.7

What is the final total amount collected by Haley and Mary Helen?

• $55.99

• $55.98

• $56.00

• $54.99

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CCSS.6.NS.B.3