Lesson 1

Tens and Ones

Est. Class Sessions: 1
X

Mathematical Standards

3.NBT.A
Use place value understanding and properties of operations to perform multi-digit arithmetic. (3.NBT.A.2)

Standards for Mathematical Practice

MP1.
Make sense of problems and persevere in solving them.
MP2.
Reason quantitatively.
MP6.
Attend to precision.

Students explore different ways to partition two-digit numbers into tens and ones, representing the numbers with connecting cubes to develop place value concepts and number sense.

Content in this Lesson

  • Composing and decomposing numbers using tens and ones in more than one way [E2].
  • Showing different partitions of numbers using connecting cubes and number sentences [E3].
  • Recognizing that different partitions of a number have the same total
    (e.g., 57 = 50 + 7 and 57 = 40 + 17) [E4].
  • Connecting base-ten partitions of a number to place value.
X

Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Books

 Student Guide      
Student Activity Book    

Teacher Resources

 Teacher Guide - digital    

Supplies for Student Pairs

100 connecting cubes

Materials for the Teacher

Unit 4 Assessment Record

Assessment in this Lesson

Assessment Expectation Assessed

Pack 'Em Up!
Check-In: Question 9
Student Activity Book
Page 100
E2.
Compose and decompose numbers using ones, tens, hundreds and thousands.
E3.
Show different partitions of numbers using base-ten pieces, number lines, and number sentences.
E4.
Recognize that different partitions of a number have the same total
(e.g., 100 + 20 + 3 = 100 + 10 + 13).

Vocabulary in this Lesson