Lengths

In first grade math, students learn about measuring and comparing lengths of objects. They are introduced to the concept of length as a measure of how long an object is from one end to the other. They use non-standard units such as paper clips, blocks, or their own hands to measure and compare the lengths of objects.

Students practice ordering objects by length, comparing the lengths of different objects, and using words such as "shorter," "longer," "taller," and "smaller" to describe the relationships between lengths.

They also learn about the concept of equal length, understanding that two objects are the same length if they cover the same distance when placed end to end.

By the end of first grade, students are expected to be able to measure and compare the lengths of objects using non-standard units and describe the relationships between different lengths using appropriate vocabulary.

Overall, the concept of lengths in first grade math lays the foundation for understanding measurement and comparison of lengths using standard units in later grades.

◂Math Worksheets and Study Guides First Grade. Ordering Numbers and Objects by Size

Study Guide

Ordering Numbers and Objects by Size

Worksheet/Answer key

Ordering Numbers and Objects by Size

Worksheet/Answer key

Ordering Numbers and Objects by Size

Worksheet/Answer key

Ordering Numbers and Objects by Size

The resources above cover the following skills:

Number and Operations (NCTM)

Understand numbers, ways of representing numbers, relationships among numbers, and number systems.

Develop understanding of the relative position and magnitude of whole numbers and of ordinal and cardinal numbers and their connections.

Algebra (NCTM)

Understand patterns, relations, and functions.

Sort, classify, and order objects by size, number, and other properties.

Measurement (NCTM)

Understand measurable attributes of objects and the units, systems, and processes of measurement.

Compare and order objects according to these attributes.

Grade 1 Curriculum Focal Points (NCTM)

Number and Operations: Developing an understanding of whole number relationships, including grouping in tens and ones

Children compare and order whole numbers (at least to 100) to develop an understanding of and solve problems involving the relative sizes of these numbers. They think of whole numbers between 10 and 100 in terms of groups of tens and ones (especially recognizing the numbers 11 to 19 as 1 group of ten and particular numbers of ones). They understand the sequential order of the counting numbers and their relative magnitudes and represent numbers on a number line.