Lesson 10 Write Two-digit Numbers

    • Let’s write two-digit numbers.

Warm-up Notice and Wonder: Same Digit, Different Place

What do you notice?
What do you wonder?

A
Connecting cubes, 7.

7

B
Connecting cubes. 7 towers of 10 cubes.

70

C
Connecting cubes. 1 tower of 10. 7 single cubes.

17

D
Connecting cubes. 7 towers of 10 cubes. 1 single cube.

71

Activity 1 Write Numbers to Match Base-Ten Representations

Write the number that matches each representation.

  1. 1 ten 4 ones

    Number:

  2. Number:

  3. 9 tens

    Number:

  4. Number:

  5. Number:

  6. Number:

  7. 2 ones 8 tens

    Number:

  8. Number:

  9. Number:

  10. Number:

Activity 2 Introduce Write Numbers: Numbers to 99 by 1

We are going to learn a new center called Write Numbers.

Practice Problem

Problem 1

Write the number that matches each representation.

  1. Connecting cubes. 2 towers of 10 cubes. 5 single cubes.
  2. Connecting cubes. 5 towers of 10 cubes. 2 single cubes.
  3. Base-ten diagram. 6 tens. 1 one.