A reference object

First introduced: Grade 1

Math

CLA Curriculum Definition

something known to be exactly 1 inch (a large paperclip, thumb width, or a 1-inch square cut from paper)

Related Terms

+1 property

For any number n, n + 1 equals the next counting number after n.

:00

the digits after the colon when it is exactly on the hour

:30

the digits after the colon when it is 30 minutes past the hour

[Answer: 16 L/day; 640 L total

plus water for the animals, which would have been enormous]

[Answer: 5 kg; 5,000 g

this uses the metric connection between liters and kilograms]

A = π × 4²

use the π button on the calculator

This term appears in CLA curriculum lessons.

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