Sometimes, in sharing and measuring there is a need to use numbers between whole numbers. It is possible to estimate quantities without knowing them exactly. Simple graphs can help to tell about observations. Shapes, such as circles, squares, and triangles, can be used to describe many things seen. Things in nature have very different sizes, weights, ages, and speeds.
Students can use whole numbers in identifying, measuring, and describing things and experiences.
Readily give the sums and differences of single-digit numbers in familiar contexts. Give rough estimates to problems. Make quantitative estimates of familiar lengths, weights, and time intervals and check them by measurement. Make something out of paper, cardboard, wood, plastic, metal, or existing objects that can be used to perform a task. Determine the linear dimensions in whole units of objects having straight edges.