1st Grade Math Unit 16

Big Idea:

Compare and order whole numbers up to 120

Student Expectations:

Priority TEKS

1.2F [Supporting] Order whole numbers up to 120 using place value and open number lines;

1.2G [Readiness] Represent the comparison of two numbers to 100 using the symbols <,>, or =;

Focus TEKS

1.2D [Supporting] Generate a number that is greater than or less than a given whole number up to 120;

1.2E [Supporting] Use place value to compare whole numbers up to 120 using comparative language;

1.5C [Supporting] Use relationships to determine the number that is 10 more and 10 less than a given number up to 120;

Ongoing TEKS

1.2(A-C)Number and Operations - The student applies mathematical process standards to represent and compare whole numbers, the relative position and magnitude of whole numbers, and relationships within the numeration system related to place value. The student is expected to: (A) recognize instantly the quantity of structured arrangements; (B) use concrete and pictorial models to compose and decompose numbers up to 120 in more than one way as so many hundreds, so many tens, and so many ones; (C) use objects, pictures, and expanded and standard forms to represent numbers up to 120.

1.3C [Supporting] Compose 10 with two or more addends with and without concrete objects;

1.3D [Supporting] Apply basic fact strategies to add & subtract within 20, including making 10 and decomposing a number leading to 10;

1.3E [Supporting] Explain strategies used to solve addition & subtraction problems up to 20 using spoken words, objects, pictorial models, and number sentences;

1.5E [Supporting] Understand that the equal sign represents a relationship where expressions on each side of the equal sign represent the same value (s);

1.5F [Supporting] Determine the unknown whole number in an addition or subtraction equation when the unknown may be any one of the 3 or 4 terms in the equation;

1.5B [Supporting] Skip count by twos, fives, and tens to determine the total number of objects up to 120 in a set;

Student Learning Targets:

• I will compare numbers up to 120.
• I will order numbers 3 or more number up to 120.
• I will order number on an open number line.
• I will identify 10 more, 10 less, 1 more, or 1 less of a number to 120.
• I will write why we need to order numbers.

Essential Questions:

• How does place value help us order numbers?
• How is an open number line used as a tool?

Extra Information:

Adopted Textbook: Pearson - enVision Math

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