Decimals: Addition and Subtraction Quiz

What is the first step when adding or subtracting decimals?

• Line up the decimals

• Bring down the decimal

• Add placeholders

• Subtract like normal

In the first example, what is the sum of 5.86 and 13.9?

• 19.76

• 18.76

• 20.76

• 17.76

Where is the decimal placed in a whole number?

• There is no decimal

• In the middle

• At the back

• At the front

What is the result of subtracting 57.98 from 100?

• 42.02

• 43.02

• 44.02

• 41.02

In the third example, what is the sum of 934.62 and 12.654?

• 948.274

• 946.274

• 947.274

• 945.274

What is the purpose of adding placeholders when adding decimals?

• To ensure digits are aligned correctly

• To make subtraction easier

• To confuse the students

• To make the numbers look bigger

In the final example, what is the result of subtracting 7.89 from 15.003?

• 9.113

• 8.113

• 7.113

• 6.113

What is the key technique used in the final subtraction example?

• Adding placeholders

• Dividing

• Multiplying

• Borrowing

What is the last step in both adding and subtracting decimals?

• Line up the decimals

• Subtract like normal

• Bring down the decimal

• Add placeholders

Why is it important to line up decimals when performing operations?

• To make the process faster

• To make the numbers look neat

• To ensure accurate calculations

• To confuse the students