Unit 9 Study Guide w/ Audio

1. For each number sentence, fill in the blank with a factor from 1 to 10 to make it true. 2. Write a number model with a letter for the unknown. Then solve the problem and write the answer. Write your number model again with the answer to check that your answer makes sense.Six robins each have a mass of about 70 grams. What is their total mass? 3. Write a number model with a letter for the unknown. Then solve the problem and write the answer. Write your number model again with the answer to check that your answer makes sense.Together, 40 bald eagles have a mass of about 240 kilograms. One wild turkey has a mass of about 6 kilograms. About how many 6-kilogram wild turkeys would it take to equal the mass of the group of bald eagles? 4. Write a number model with a letter for the unknown. Then solve the problem and write the answer. Write your number model again with the answer to check that your answer makes sense.About how many 50-gram parrots have a mass equal to one 1,000-gram pheasant? 5a. Use the break-apart strategy to solve each problem. You may use mental math, drawings, number sentences, or words to show your thinking. 5b. Use the break-apart strategy to solve each problem. You may use mental math, drawings, number sentences, or words to show your thinking. 5c. Eduardo drew a rectangle to help solve 7 x 56. Here is his work: Explain how Eduardo solved the problem. 6.It started snowing at 10:20 A.M. and stopped at 12:45 P.M. How long did it snow?Show your thinking. You may use an open number line, a clock, or other representations.