Problem Solving When Adding and Subtracting Decimals

Giselle weighed two different samples of chemical in her science class. The first sample weighed 39.05 grams. The second weighed 56.7 grams. She then mixed the two chemicals together. What was the weight of the combined samples?

• 17.65 grams

• 44.72 grams

• 85.85 grams

• 95.75 grams

Lacy and Gerald gave their heights for a school survey. Lacy's height is 51.25 inches. Gerald's height is 46.65 inches. How many inches taller is Lacy than Gerald?

• 4.6 inches

• 5.4 inches

• 15.4 inches

• 15.6 inches

Matt's wining time in the 200-meter sprint was 26.03 seconds. Ryan's time was 0.45 seconds slower that Matt's. What was Ryan's time?

• 26.58 seconds

• 26.48 seconds

• 25.58 seconds

• 25.48 seconds

Luis bought a bottle of water at the gym for $2.85, including tax. If he paid for it with a $5.00 bill, how much change should he have received?

• $2.15

• $3.15

• $3.85

• $7.85

Garrett checked one of his funds online. He saw that it had gone up by $427.37. The fund had $5,348.18 before it went up. How much is in Garrett's fund now?

• $4,920.81

• $4,921.81

• $5,765.45

• $5,775.55

Garrett checked one of his funds online. He saw that it had gone up by $427.37. The fund now has $5,348.18. How much was in Garrett's fund before it went up?

• $4,920.81

• $4,921.81

• $5,765.45

• $5,775.55

Maria bought a bicycle lock with a $10.00 bill. The bicycle lock cost $6.27. How much change did Maria get back?

• $3.73

• $4.27

• $14.83

• $16.27

Grace needs to buy two yards of fabric for a school project. If the fabric is $7.96, how much change will she get back if she pays with a $20 bill?

• $27.96

• $12.04

• $12.40

• $12.30

Maya bought paints and brushes at the craft store for $32.87. How much should she receive back if she gave the cashier a $50 bill?

• $17.13

• $18.13

• $19.13

• $20.13

An apple weighs 0.16 kg. A slice of watermelon weighs 0.25 kg. How much more does the slice of watermelon weigh than the apple?

• 0.09 kg

• 0.9 kg

• 9 kg

• 0.009 kg