Solve the following word problems involving decimal arithmetic with real-world scenarios.

Let's solve each word problem step by step.

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Problem 1: Ribbon Lengths

Given:
- Jasmine's ribbon = 12.6 metres
- Sharon's ribbon is 3.8 metres shorter than Jasmine's

Step 1: Find Sharon's ribbon length
Sharon's ribbon = 12.6 - 3.8 = 8.8 metres

Step 2: Add both lengths
Total length = 12.6 + 8.8 = 21.4 metres

✔ Answer: The total length of the two ribbons is 21.4 metres.

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Problem 2: Volume of Water in Jugs

Given:
- Jug A = 2.17 litres
- Jug B has 0.79 litres less than Jug A

Step 1: Find Jug B’s volume
Jug B = 2.17 - 0.79 = 1.38 litres

Step 2: Add both volumes
Total volume = 2.17 + 1.38 = 3.55 litres

✔ Answer: The total volume of water in the two jugs is 3.55 litres.

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Problem 3: Height of Trees

Given:
- Coconut tree = 7.6 metres
- Mango tree is 3.4 metres shorter than coconut tree

Step 1: Find mango tree height
Mango tree = 7.6 - 3.4 = 4.2 metres

Step 2: Add both heights
Total height = 7.6 + 4.2 = 11.8 metres

✔ Answer: The total height of the two trees is 11.8 metres.

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Problem 4: Mass of Potatoes in Sacks

Given:
- Sack A = 32.5 kg
- Sack B has 3.7 kg more than Sack A

Step 1: Find Sack B’s mass
Sack B = 32.5 + 3.7 = 36.2 kg

Step 2: Add both masses
Total mass = 32.5 + 36.2 = 68.7 kg

✔ Answer: The total mass of potatoes in the two sacks is 68.7 kg.

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✔ Final Answers:

1. 21.4 metres
2. 3.55 litres
3. 11.8 metres
4. 68.7 kg

Each problem involves either subtraction to find a missing quantity and then addition to get the total. Careful attention to decimal places ensures accuracy.