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

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

It rained 0.72 inches on Monday. On Tuesday, it rained 0.34 inches less than on Monday. How much did it rain on Tuesday?

• .38
• .37
• .39
• 1.08

It rained 0.68 inches on Saturday and 0.02 inches on Sunday. How much did it rain on Saturday and Sunday combined?

• 1.70

• 70

• .70

• 7.0

Tucker bought 2.78 pounds of melon and 2.27 pounds of cherries. How much fruit did he buy in all?

• .51
• 5.15
• .52
• 5.05

Paul has $49.75 and Steven has $14.22. How much more does Paul have than Steven? 

• $40.25
• $65.24
• $38.75
• $35.53

Jack has 1 quarter, 4 nickels, and 3 pennies. How much money does he have?

• 50 cents

• 68 cents

• 48 cents

• 63 cents