Fill in the blank: The sum of $4.00 for a sandwich and $1.50 for orange juice is ___.

$5.50

What is the first step in the column method for adding whole numbers?

Write the numbers vertically, aligning the digits by place value.

How would you express 367 - 185 using decomposition?

You break 367 into 300 + 60 + 7 and 185 into 100 + 80 + 5, then subtract each place value.

If a student uses the column method incorrectly, what common mistake might they make?

They might misalign the numbers by not correctly placing them according to their place values.

What is the total cost of three items priced at $2.50, $3.75, and $4.25 using the column method?

Total cost is $10.50, calculated by aligning and adding the amounts in columns.

Fill in the blank: The final result of subtracting 300 - 100, 50 - 80, and 17 - 5 after regrouping is ___.

182

True or False: In the column method, you can directly subtract the tens without regrouping if the top number has fewer tens than the bottom number.

False. You must regroup from the hundreds if the top number has fewer tens than the bottom number.

In the column method of subtraction, what do you do if the top number in a column is smaller than the bottom number?

You regroup from the next column to adjust the top number.

True or False: The result of subtracting corresponding parts in the decomposition method is always a positive number.

False. You may need to regroup to avoid negative results.

Riddle: I am a method where you line up numbers vertically to subtract easily. What am I?

The column method.

What is the result of the subtraction 7 - 5?

The result is 2.

When regrouping tens in the subtraction of 367 - 185, how is the tens column adjusted?

The tens are adjusted from 6 tens to 16 tens to facilitate the subtraction.