Mastering Multi-Digit Addition Techniques

This video tutorial from Math Antics teaches how to perform multi-digit addition. It begins by explaining what multi-digit numbers are and how to align them for addition. The tutorial then demonstrates the process of adding numbers by stacking them, ensuring proper alignment of number places, and starting from the ones place. It covers carrying over digits and re-grouping when necessary. The video concludes with practice recommendations and encourages using a calculator to verify answers.

What is a multi-digit number?

• A number with only one digit

• A number with more than one digit

• A number less than 10

• A number that cannot be added

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CCSS.1.NBT.A.1

In the number 215, what digit is in the tens place?

• 0

• 5

• 1

• 2

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CCSS.4.NBT.A.1

What is the first step in adding multi-digit numbers?

• Writing a plus sign

• Adding the digits in the hundreds place

• Stacking the numbers on top of each other

• Drawing a line below the numbers

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CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Why is it important to line up the number places correctly?

• To avoid using a calculator

• To ensure the digits in each place value are added correctly

• To make the addition faster

• To make the numbers look neat

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CCSS.2.NBT.B.7

When adding multi-digit numbers, which column do you start with?

• Tens place

• Thousands place

• Hundreds place

• Ones place

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CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

What do you do if the sum of a column is a two-digit number?

• Write both digits in the answer

• Ignore the second digit

• Carry the extra digit to the next column

• Start over

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CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

In the example 1,850 + 354, what is the sum of the digits in the tens place?

• 8

• 10

• 9

• 5

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CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

What is the term used for carrying the extra digit to the next column?

• Aligning

• Subtracting

• Regrouping

• Borrowing

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CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

In the example 145 + 809 + 77, what is the sum of the digits in the hundreds place?

• 9

• 8

• 7

• 10

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CCSS.2.NBT.B.7

What is a good practice to check your answers after adding multi-digit numbers?

• Ignoring mistakes

• Asking a friend

• Using a calculator

• Rewriting the problem

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CCSS.2.NBT.B.5