Partial Sum Addition Techniques

This lesson explains partial sum addition by organizing numbers into tens and ones columns. The process involves adding the tens values first, followed by the ones values, and then combining these results to find the final sum. The example used is 17 plus 25, which equals 42.

What is the first step in partial sum addition?

• Setting up columns for tens and ones

• Multiplying the tens

• Dividing the numbers

• Subtracting the ones

In partial sum addition, where do you write the tens and ones?

• In a single column

• In separate columns

• In a row

• In a circle

What is the purpose of setting up tens and ones columns?

• To multiply the numbers

• To divide the numbers

• To subtract the numbers

• To organize numbers for addition

What is the next step after writing numbers in columns?

• Dividing the tens

• Multiplying the ones

• Adding the tens values

• Subtracting the tens

What is the sum of 10 and 20 in the tens column?

• 10

• 20

• 30

• 40

After adding the tens, what is the next step?

• Adding the ones values

• Dividing the ones

• Subtracting the ones

• Multiplying the tens

What is the sum of 7 and 5 in the ones column?

• 13

• 12

• 11

• 10

How do you handle the ones column in partial sum addition?

• Ignore the values

• Add the values

• Subtract the values

• Multiply the values

What is the final step in partial sum addition?

• Adding down the columns

• Subtracting the total

• Dividing the total

• Multiplying the total

What is the result of adding 0 and 2 in the final step?

• 4

• 3

• 2

• 1