Rachel found the masses of three rocks for a science project. The first rock had a mass of 19.28 grams, the second rock had a mass of 25.3 grams, and the third rock had a mass of 46.3 grams. How much greater was the mass of the third rock than the combined mass of the other two rocks?

Question

Mathematics

Dean Horn

22 June, 03:03

Rachel found the masses of three rocks for a science project. The first rock had a mass of 19.28 grams, the second rock had a mass of 25.3 grams, and the third rock had a mass of 46.3 grams. How much greater was the mass of the third rock than the combined mass of the other two rocks?

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Strong · Answer 1

1st rock = 19.28 grams

2nd rock = 25.30 grams

3rd rock = 46.3 grams

Add 1st and 2nd rock to get the combined mass

19.28 + 25.30 = 44.58 combined mass of 1st and 2nd rock

Subtract:

3rd rock mass - combined mass of 1st and 2nd rock

46.30 - 44.58 = 1.72 grams

1.72 grams greater was the mass of the 3rd rock than the combined mass of the two rocks.