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Decimal Addition Subtraction Methods

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Decimal Addition Subtraction Methods worksheet preview

Decimal Addition Subtraction Methods

Decimal calculation illustration

🎯 WALT: Use vertical-column and horizontal methods to add and subtract decimals

Part 1: Vertical-Column Method

1. Complete the vertical addition. Line up the decimal points!

23.45

+ 16.32

_______

Answer: _______

2. Complete the vertical subtraction:

87.65

- 34.21

_______

Answer: _______

3. Set up and solve vertically: 145.67 + 28.45
4. Set up and solve vertically: 92.84 - 37.56

Part 2: Horizontal Method & Estimation

5. Solve horizontally: 56.23 + 31.45 = _______

Show your working:

6. Solve horizontally: 78.92 - 25.67 = _______

Show your working:

7. Estimate to check your answer from question 5:

Round 56.23 to the nearest whole number: _______

Round 31.45 to the nearest whole number: _______

Estimated answer: _______ + _______ = _______

Is your answer from question 5 reasonable? Circle: YES / NO

Part 3: Real-World Problems

8. Sarah bought a book for $12.75 and a pen for $3.45. How much did she spend in total?

Calculation: _________________

Answer: $ _______

9. Tom had $50.00. He spent $23.65 on lunch. How much money does he have left?

Calculation: _________________

Answer: $ _______

10. Extension Challenge: A recipe needs 2.75 cups of flour and 1.25 cups of sugar. If you only have 3.50 cups total, do you have enough ingredients? Show your working.

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