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Texas Essential Knowledge and Skills Teaching Resources

Math 2.9

Geometry and measurement. The student applies mathematical process standards to select and use units to describe length, area, and time. The student is expected to:

  • (1) find the length of objects using concrete models for standard units of length;
    • (A) describe the inverse relationship between the size of the unit and the number of units needed to equal the length of an object;
    • (B) represent whole numbers as distances from any given location on a number line;
    • (C) determine the length of an object to the nearest marked unit using rulers, yardsticks, meter sticks, or measuring tapes;
    • (D) determine a solution to a problem involving length, including estimating lengths;
    • (E) use concrete models of square units to find the area of a rectangle by covering it with no gaps or overlaps, counting to find the total number of square units, and describing the measurement using a number and the unit; and
    • (F) read and write time to the nearest one-minute increment using analog and digital clocks and distinguish between a.m. and p.m.