Adding and Subtracting Whole Numbers and Decimals

Why is it important to line up decimals when adding or subtracting?

• To make the numbers look neat

• To make the problem easier to read

• To ensure accurate calculations

• To follow a specific rule

What can you add to a whole number to align it with a decimal number?

• A decimal point

• A zero

• A fraction

• A one

In the example 3 + 0.278, what is the result?

• 3.287

• 3.27

• 3.28

• 3.278

When adding 7 + 1.23, what should you do if there is no number above the decimal places?

• Add zeros to fill the gaps

• Leave it as it is

• Add ones to fill the gaps

• Ignore the decimal places

What is the result of adding 7 + 1.23?

• 8.3

• 8.23

• 8.123

• 8.13

In the subtraction problem 12 - 3.82, what is the first step?

• Add the numbers

• Align the decimals

• Convert to fractions

• Subtract directly

What do you do if you can't subtract a smaller decimal from a larger one directly?

• Ignore the smaller decimal

• Borrow from the next column

• Subtract the whole number first

• Add a zero

What is the result of 12 - 3.82?

• 8.48

• 8.38

• 8.28

• 8.18

What should you add to a whole number to align it with a decimal for subtraction?

• A one

• A decimal point

• A zero

• A fraction

What is the key point to remember when adding or subtracting whole numbers and decimals?

• Always add a one to the whole number

• Always convert to fractions first

• Always subtract the decimal first

• Always line up the decimals