April Barth Libros

Centímetro Y Metro

Most countries in the world use the metric system of measurement. See how to use metric units of measure to find length.

Did you know that addition and subtraction are related? See how fact families can help you find sums and differences.

Inch, foot, and yard are units of measure in the U.S. Customary System of Measurement. See how to use these units to measure length.

When you do no need to know an exact amount, you can estimate. See how to estimate sums and differences.

Some objects look like solid shapes! Learn how to use special words to describe where the objects are.