NAME ______________________________ DATE _______________

ACTIVITY

(PAGE 1 OF 2)

Problems about Multiples of 21

Use the multiple tower for 21 or your list of multiples of 21 to help you with these problems. Use your answers to the earlier problems to help you with the later problems.

  • 1 10 × 21 = _______________

  • 2 105 ÷ 21 = _______________

  • 3 315 ÷ _______________ = 21

  • 4 _______________ × 21 = 420

  • 5 5 × 21 = _______________

  • 6 210 ÷ 21 = _______________

  • 7 15 × 21 = _______________


End ofPage 51

Table of Contents

Investigations 3 in Number, Data, and Space®, Student Activity Book Unit 1 Puzzles, Clusters, and Towers Unit 2 Prisms and Solids Unit 3 Rectangles, Clocks, and Tracks Unit 4 How Many People and Teams? Unit 5 Temperature, Height, and Growth Unit 6 Between 0 and 1 Unit 7 Races, Arrays, and Grids Unit 8 Properties of Polygons