Activity: Adding 2-digit numbers Complete this interactive activity to learn more about adding numbers using column addition and then put your knowledge to the test with a quiz.

Ralph van Dijk has the questions and the subject of today's quiz is the addition and subtraction of two-digit numbers.

The trick is adding the numbers together, and then taking the answer and inverting the digits. So, 12 + 13 = 25, but 25 inverted is 52. Read more Simple math brainteaser ignites a firestorm online ...

Transcript You Might Also Like Math Mights Add 2-Digit Numbers Season 3 Episode 304 | 15m 59sVideo has Closed Captions| CC Join Mrs. Markavich for a word problem with her friend Professor Barble!

48 pages : 28 cm Contains blackline masters with activities for teaching addition and subtraction. Cheerful illustrations make learning more fun. Grades 2-3 ...

Parents need to know that Operation Math: Addition, Subtraction, Multiplication, and Division Speed Drills & Practice Test – Arithmetic Games for Kids helps kids build fluency in any of the four main ...

Tape Diagrams: 2-Digit Addition and Subtraction | Grade 2 Special | 2m 20s Your child continues to use tape diagrams as a visual tool to solve word problems.

The Common Core State Standards teach students the algorithm for multi-digit addition and subtraction in 4th grade. But some experts say it should be taught sooner.