11 Questions
What is the correct way to subtract decimals?
Line up the decimal points and subtract each place value column
Subtracting decimals is used in everyday life, such as calculating change owed to a customer.
True
What is the result of subtracting 2.5 from 8.9?
6.4
When comparing decimal numbers, we first compare the ______________ parts and then the decimal parts.
whole number
What is the result of adding 2.8 to 5?
7.8
Match the following decimal operations with their real-world applications:
Subtracting decimals = Measuring ingredients for a recipe Adding decimals with whole numbers = Calculating change owed Comparing decimal numbers = Science and engineering All of the above = All of the above
What does the word 'obliged' mean?
To feel grateful or indebted to someone
The word 'eerie' is an adjective that means causing feelings of fear or unease.
True
What is the meaning of the word 'peril'?
Danger or risk of harm
The word 'heartily' is an adverb that means to do something ______________________.
with enthusiasm or sincerity
Match the following words with their meanings:
Appalling = Causing feelings of shock or disgust Plight = A difficult or precarious situation Spite = A feeling of ill will or hatred Trudge = To walk slowly and laboriously Undergrowth = Vegetation that grows under the main trees in a forest
Study Notes
Subtracting Decimals
- To subtract decimals, follow the same steps as subtracting whole numbers:
- Line up the decimal points
- Subtract each place value column (right to left)
- Borrow from the next column to the left if necessary
- Example: 9.4 - 2.1 = ?
- Line up the decimal points: 9.4 - 2.1
- Subtract each place value column: 9 - 2 = 7, 0.4 - 0.1 = 0.3
- Result: 9.4 - 2.1 = 7.3
Real-world Applications
- Measuring ingredients for a recipe: subtracting decimals is used to calculate the exact amount of ingredients needed
- Calculating change owed: subtracting decimals is used to calculate the exact change owed to a customer
- Science and engineering: subtracting decimals is used to calculate precise measurements and quantities
Comparing Decimal Numbers
- Compare decimal numbers by comparing the whole number parts and then the decimal parts
- Example: Compare 4.8 and 4.2
- Whole number parts are equal (4)
- Compare decimal parts: 0.8 > 0.2, so 4.8 > 4.2
Adding Decimals With Whole Numbers
- To add decimals with whole numbers, follow the same steps as adding whole numbers:
- Line up the decimal points
- Add each place value column (right to left)
- Carry or regroup to the next column to the left if necessary
- Example: 5 + 3.2 = ?
- Line up the decimal points: 5 + 3.2
- Add each place value column: 5 + 3 = 8, 0.2
- Result: 5 + 3.2 = 8.2
Subtracting Decimals
- To subtract decimals, line up the decimal points and subtract each place value column from right to left.
- Borrow from the next column to the left if necessary.
- Example: 9.4 - 2.1 = 7.3.
Real-World Applications
- Subtracting decimals is used to calculate exact amounts of ingredients in recipes.
- It is used to calculate exact change owed to customers.
- It is used in science and engineering to calculate precise measurements and quantities.
Comparing Decimal Numbers
- Compare decimal numbers by comparing whole number parts and then decimal parts.
- If whole number parts are equal, compare decimal parts.
- Example: 4.8 > 4.2 because 0.8 > 0.2.
Adding Decimals With Whole Numbers
- To add decimals with whole numbers, line up the decimal points and add each place value column from right to left.
- Carry or regroup to the next column to the left if necessary.
- Example: 5 + 3.2 = 8.2.
Subtracting Decimals
- To subtract decimals, line up the decimal points and subtract each place value column from right to left, borrowing from the next column to the left if necessary
- Example: 9.4 - 2.1 = 7.3
Real-world Applications
- Subtracting decimals is used in measuring ingredients for a recipe to calculate the exact amount needed
- Subtracting decimals is used in calculating change owed to a customer
- Subtracting decimals is used in science and engineering to calculate precise measurements and quantities
Comparing Decimal Numbers
- Compare decimal numbers by comparing the whole number parts and then the decimal parts
- If the whole number parts are equal, compare the decimal parts
- Example: 4.8 > 4.2 because 0.8 > 0.2
Adding Decimals With Whole Numbers
- To add decimals with whole numbers, line up the decimal points and add each place value column from right to left, carrying or regrouping to the next column to the left if necessary
- Example: 5 + 3.2 = 8.2
Test your understanding of subtracting decimals with whole numbers and real-world applications.
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