Trinette Carruthers help students use the plus sign to write an addition expression. Trinette Carruthers and her daughter help students use the plus sign to write an addition expression.

In this companion to Help Me Learn Numbers 0–20, Marzollo and Phillips teach basic addition skills by making use of rhymed verse and bright photographs of toys and other recognizable objects. In one ...

Here you will find a video about addition and subtraction. Watch this, and then test your knowledge with a short quiz before exploring the rest of the collection. This section contains videos from our ...