Rounding and Estimating Sums with Decimals in Daily Life

1. Sarah bought 3.76 meters of fabric and 2.45 meters of ribbon. How much fabric and ribbon did she buy in total when rounded to the nearest hundredth?

• 7.10 meters

• 6.21 meters

• 6.00 meters

• 5.50 meters

2. A bottle contains 1.23 liters of juice. If you pour out 0.78 liters, how much juice is left in the bottle when rounded to the nearest hundredth?

• 0.45

• 0.78

• 1.23

• 0.55

3. Tom scored 89.67 points in math and 92.34 points in science. Estimate his total score by rounding each score to the nearest whole number before adding them together.

• 180

• 185

• 190

• 182

4. A car travels 15.89 miles in the morning and 12.45 miles in the afternoon. How far did the car travel in total when rounded to the nearest hundredth?

• 30.12

• 27.45

• 28.34

• 25.67

5. Emily has 4.56 kg of apples and 3.78 kg of oranges. If she wants to know the total weight of the fruits, what is the estimated total weight when rounded to the nearest hundredth?

• 7.50 kg

• 8.34 kg

• 8.00 kg

• 9.12 kg

6. A recipe calls for 2.34 cups of flour and 1.89 cups of sugar. If you round each ingredient to the nearest whole number, what is the estimated total amount of ingredients needed?

• 6

• 4

• 3

• 5

7. A book costs $12.99 and a magazine costs $4.75. If you want to estimate the total cost when rounded to the nearest dollar, what would it be?

• 15

• 18

• 20

• 10

8. A swimming pool holds 25.67 cubic meters of water. If 10.45 cubic meters are already filled, how much more water is needed when rounded to the nearest hundredth?

• 15.22

• 10.45

• 5.75

• 20.00

9. During a sale, a shirt costs $19.99 and pants cost $29.49. Estimate the total cost by rounding each price to the nearest ten before adding them together.

• $50

• $40

• $60

• $30

10. A gardener planted 3.14 meters of flowers and 2.86 meters of shrubs. What is the total length of plants when rounded to the nearest hundredth?

• 6.00

• 7.00

• 5.50

• 6.50