Estimating and Using Number Lines with Rational Numbers

1. Sarah has 3.5 meters of ribbon. She uses 1.2 meters for a project and then buys another 2.3 meters. How much ribbon does she have left?

• 4.6 meters

• 3.0 meters

• 2.1 meters

• 5.8 meters

2. A baker made 4.5 kg of dough. He used 1.75 kg for bread and 1.25 kg for pastries. How much dough remains?

• 2.0 kg

• 1.5 kg

• 3.0 kg

• 1.0 kg

3. Tom ran 2.4 kilometers in the morning and 1.8 kilometers in the evening. If he wants to run a total of 6 kilometers, how much more does he need to run?

• 1.8 kilometers

• 3.6 kilometers

• 2.4 kilometers

• 1.0 kilometers

4. A tank holds 15.5 liters of water. If 6.2 liters are used for watering plants and 3.3 liters for cleaning, how much water is left in the tank?

• 5.0 liters

• 7.5 liters

• 8.0 liters

• 6.0 liters

5. Lisa bought 2.5 kg of apples and 1.75 kg of oranges. If she gives away 0.5 kg of apples, how much fruit does she have now?

• 2.5 kg

• 5 kg

• 3.75 kg

• 4.25 kg

6. A car travels 120.5 kilometers on Monday and 85.75 kilometers on Tuesday. How far did the car travel in total over the two days?

• 206.25 kilometers

• 200.00 kilometers

• 210.50 kilometers

• 205.75 kilometers

7. A recipe requires 2.5 cups of flour. If you only have 1.75 cups, how much more do you need to buy to make the recipe?

• 0.75 cups

• 1 cup

• 2 cups

• 0.5 cups

8. A swimming pool is filled with 10.5 cubic meters of water. If 3.2 cubic meters are drained, how much water remains in the pool?

• 5.0 cubic meters

• 8.2 cubic meters

• 6.5 cubic meters

• 7.3 cubic meters

9. Emma read 1.5 books in January and 2.25 books in February. If she wants to read a total of 10 books this year, how many more does she need to read?

• 5.75

• 8.0

• 6.25

• 7.5

10. A gardener planted 3.5 meters of flowers in one row and 2.75 meters in another. How many meters of flowers did he plant in total?

• 5.5 meters

• 6.25 meters

• 7.0 meters

• 4.25 meters