Today we focus on using numbers lines to solve. Julia uses her chart and white board examples to solve the addition and subtraction problems in a fact family. / Julia Knarr, The Soulard School ...

Save guides, add subjects and pick up where ... the desert and the mountain top is 42 °C. To subtract -2 from 4, start at number 4 on a number line, and count to the right. So, \(4 - (- 2 ...

To add -4 and 5, draw the starting ... the desert and the mountain top is 42 °C. To subtract -2 from 4, start at number 4 on a number line, and count to the right. So, \(4 - (- 2) = 6\).

Jackson Ryan was CNET's science editor, and a multiple award-winning one at that. Earlier, he'd been a scientist, but he realized he wasn't very happy sitting at a lab bench all day. Science ...