Level 3: Sums 13 to 20 Adding and subtracting basic equations by sight is essential to a solid math foundation. Meet the Math Facts 1, 2, and 3 make learning to add and subtract fun and easy! With ...

Figuring out a word problem. Calculating area and perimeter. Finding the measure of an unknown angle. All these tasks, and more, draw on an essential foundation of math knowledge, said Brian Bushart, ...

As surely as 2+2=4, it also equals a beginning step on students’ mathematics journey. Single-digit addition facts like these are so heavily used in mathematics that it’s critical that students ...

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