1-3

Solve.

BOOKS Khadijah’s book weighs 900 grams. How many milligrams does the book weigh?

Understand Read the question. Write what you know.

The book weighs 900 grams.

1-3

Plan Pick a strategy. One strategy is to solve a simpler problem.

Work with 100, and then multiply your answer by 9 to find the total milligrams in the book.

1000 milligrams is equal to 1 gram.

1-3

Solve You are converting from grams to milligrams, so you need to multiply.

100 grams x 1,000 = 100,000 milligrams

100,000 milligrams × 9 = 900,000 total milligrams

Khadijah’s book weighs 900,000 milligrams.

1-3

Check A milligram is a smaller unit of measure than a gram, so the number of milligrams should be greater than the number of grams.