A scale drawing of a bridge has the same shape as the real bridge that it represents but a different size. Scale drawings close scale drawingAn accurate drawing, or model, of a representation of a ...

Want to help your seventh-grader master math? Here are some of the skills your child will be learning in the classroom in seventh grade. At a “25% Off” sale, Marissa buys a skirt for $40.50. What was ...

Revise how to work out equivalent ratios and simplify ratios by dividing both sides by the highest common factor. Test yourself with practice questions and a game. NEW: Ratio and fractions, and ...

Breathe. As your lungs expand, air fills 500 million tiny alveoli, each a fraction of a millimeter across. As you exhale, these millions of tiny breaths merge effortlessly through larger and larger ...