Count back & use the relationship between addition and subtraction to subtract within 20.

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

Discover simple and fun subtraction tricks for kids! Learn easy mental math shortcuts to boost confidence and make subtraction enjoyable for young learners.

Color-coded math problems In experiments, the team trained the animals to recognize the colors blue and yellow as symbols for adding or subtracting by a factor of one. Eight of the fish were ...

From classrooms to kitchen tables, debates about math education are never far away. Should teachers drill multiplication ...