Chapter 12

Numbers to 40

1st Grade: Chapter 12 Outline

Week 25 - Week 26

Essential Questions:

    • How can patterns help me to count?
    • How do numbers represent objects?
    • How are place value patterns repeated in large numbers?
    • How can I compare numbers using place value?

Content:

Students will know and understand:

    • numerals to 40
    • a "ten" consists of ten ones.
    • a numeral can stand for many different amounts, depending on its position or place in a number.

Skills:

Students Will:

    • read and write numerals to 40.
    • count to 40 starting at any number.
    • represent objects using numerals.
    • represent a number with tens and ones.
    • group ones into bundles of 10's to find place value.
    • compare numbers using place value.

Assessment

Chapter 12 Assessment: Numbers to 40

Formative Test: Common

Upon completion of Unit 12:

  • 1.OA.C.5. Relate counting to addition and subtraction (e.g., by counting on 2 to add 2).
  • 1.OA.D.8. Determine the unknown whole number in an addition or subtraction equation relating to three whole numbers.
  • 1.NBT.A.1. Count to 120, starting at any number less than 120. In this range, read and write numerals and represent a number of objects with a written numeral.
  • 1.NBT.B.2. Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases:
  • 1.NBT.B.2a. 10 can be thought of as a bundle of ten ones — called a “ten.”
  • 1.NBT.B.2c. The numbers 10, 20, 30, 40, 50, 60, 70, 80, 90 refer to one, two, three, four, five, six, seven, eight, or nine tens (and 0 ones).
  • 1.NBT.B.3. Compare two two-digit numbers based on meanings of the tens and ones digits, recording the results of comparisons with the symbols >, =, and <.
  • MP.1. Make sense of problems and persevere in solving them.
  • MP.2. Reason abstractly and quantitatively.
  • MP.5. Use appropriate tools strategically.
  • MP.7. Look for and make use of structure.