Students put all of their addition and subtraction skills together to solve equations. In this lesson, students put all of their addition and subtraction skills together to solve equations. Julia ...

You can add or subtract numbers in lots of different ways. You can use number lines, number bonds, fact families, 10 squares and counters, or even just writing the numbers down. Sometimes it is faster ...

Want to help your fifth-grader master math? Here are some of the skills your fifth-grader will be learning in the classroom. Explain or illustrate how you solved this problem. Tip: Highlight ...

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 writing, ...

Hello, I'm Mr Firth, and I need your help today as we learn to add and subtract within ten. You can use lots of things to help you add and subtract. Counters, number lines and even your fingers. Let's ...

Join Mrs. McCartney for an addition number talk with D.C.! Join Mrs. McCartney for an addition number talk with D.C.! Get ready to have some fun subtracting two-digit numbers with regrouping and ...

Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. Hi, my name is Miss James and I can't wait to find out just how clever you are in our lesson today. For ...

Scientists believe stingrays and zebra mbuna fish can do simple maths involving addition and subtraction of numbers between one and five. It follows a study at the University of Bonn, in Germany, ...