Lesson 4

Exploring with Base-Ten Pieces

Est. Class Sessions: 2

Daily Practice and Problems

Teacher Notes
X

Have the 200 Chart readily available.

  1. 5 + 95 = 100
    25 + 75 = 100
    35 + 65 = 100
    45 + 55 = 100
  2. 20 + 5 + 75 = 100
    30 + 5 + 65 = 100
    40 + 5 + 55 = 100

L. Sums of 100

  1. What pairs of numbers have a sum of 100?

  2. Write the numbers 20, 30, and 40 in the box. Write as many number sentences as you can using three addends that have a sum of 100.