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Match a story problem and an equation. Write a story problem to match an equation. Subitize with a 10-frame and then build one more than your number on the Rekenrek (counting buddy). Use Notice and ...
Most famous equation: Einstein's E = mc2, which means energy is equal to mass times the speed of light squared. Known digits of pi: More than 105 trillion digits Digits of pi NASA uses for equations: ...
"Even the +, −, =, and x signs we take for granted only came into widespread use in the 17th century. Which means that the earlier algebraists we know of … all had expressed their equations mostly in ...
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