Decomposing Numbers and Properties

This video tutorial teaches how to add four two-digit numbers by decomposing them into tens and ones. It begins with an introduction to decomposing numbers and the commutative property of addition. Two examples are provided, where numbers are broken down into tens and ones, summed separately, and then combined to find the total. The lesson concludes with a recap of the key concepts learned.

What is the process of breaking down numbers into smaller parts called?

• Decomposing

• Subtracting

• Multiplying

• Commutative property

Which property states that the order of addends does not affect the sum?

• Identity property

• Associative property

• Distributive property

• Commutative property

How many tomatoes did the farmer pick on Monday in the first example?

• Fourteen

• Twenty-three

• Twenty-six

• Thirty-five

What is the sum of the tens in the first example?

• Seventy

• Sixty

• Eighty

• Ninety

What is the total number of tomatoes picked in the first example?

• Eighty-six

• Ninety-eight

• One hundred

• Seventy-two

How many tomatoes did the farmer pick on Monday in the second example?

• Twelve

• Seventeen

• Twenty-four

• Thirty-three

What is the sum of the ones in the second example?

• Sixteen

• Eighteen

• Fourteen

• Twenty

What is the total number of tomatoes picked in the second example?

• Sixty-four

• Seventy

• Ninety-eight

• Eighty-six

What is the first step in decomposing numbers for addition?

• Multiplying the numbers

• Decomposing into tens and ones

• Subtracting the tens

• Adding the ones

What is the main concept taught in this lesson?

• Dividing two-digit numbers

• Multiplying two-digit numbers

• Adding four two-digit numbers by decomposing

• Subtracting two-digit numbers