Lesson 8: A Story of Units - TEKS Edition

What is the value of 409 × 21, rounded to the nearest thousand?

• 400,000

• 800,000

• 8,000

• 80,000

Which property allows for the order of factors to be changed without changing the product?

• Associative property

• Commutative property

• Distributive property

• Identity property

What is the value of (41 - 11) × 12?

• 240

• 360

• 480

• 600

Jaxon earned $39 raking leaves. His brother, Dayawn, earned 7 times as much waiting on tables. Write a numerical expression to show Dayawn's earnings. How much money did Dayawn earn?

• $273; $273

• $273; $280

• $280; $273

• $280; $280

What does the expression 8 × 31 mean when 31 is designated as the unit?

• Add thirty-one 8 times

• Add eight 31 times

• Add eight 30 times

• Add thirty-one 30 times

What is the value of 49 × 20?

• 490

• 980

• 1,960

• 3,920

How can 14 × 50 help you find 14 × 49?

• Add 50 fourteens and subtract 1 fourteen

• Add 49 fourteens and subtract 1 fourteen

• Add 50 fourteens and subtract 1 fifteen

• Add 49 fourteens and subtract 1 fifteen

What is the value of 12 × 25?

• 240

• 300

• 360

• 420

What is the value of 16 × 99?

• 1,584

• 1,584

• 1,584

• 1,584

Joy is helping her father to build a rectangular deck that measures 14 ft by 19 ft. Find the area of the deck using a mental strategy. Explain your thinking.

• 266 sq ft; Multiply 14 by 19

• 133 sq ft; Multiply 14 by 19

• 266 sq ft; Add 14 and 19

• 133 sq ft; Add 14 and 19