Module 3 Lesson 21

Kendra wants to make a lid for a small wooden box. She needs 8 pieces of wood, each 14 centimeters long. How many centimeters of wood does she need?

• 102

• 112

• 104

• 82

Gerrie is 24 years old. Her grandmother is 3 times as old. How old is her grandmother?

David solved the multiplication problem below. Solve the problem using the standard algorithm strategy. Is he correct? David's Work 85 x 5= 405​ (a)  

• no
• yes

Ashley's brother works at a car wash and earns $46 per day. Ashley will use partial products to calculate how much money her brother earns in 8 days. How much money does Ashley's brother earn in 8 days?

• 46x8=

  40x8=320

  6x8=48

  320+48=368

• 46+8=$54

• 46x8=

  40x6=240

  6x6= 36

  240+36=276

• 46x8=

  4x8= 32

  6x8=48

  32+48=80

To get enough money to go on a field trip, every student in a club has to raise $53 by selling chocolate bars. There are 9 students in the club. How much money does the club need to raise to go on the field trip?

Solve the story problem using partial products or standard algorithm.