Rounding can be a challenging skill. Help your students better understand rounding, to the nearest 10 and 100, using interactive number lines, hands-on rounding activities, games and independent practice.
The Golden ratio is a number found by dividing a line into two parts so that the longer part divided by the smaller part is also equal to the whole length divided by the longer part. It is symbolized using phi, after the Greek alphabet. In an equation form, it looks like this: a/b = (a+b)/a = 1.618033988749894842 As with pi, the digits go on and on, theoretically into infinity. Phi is usually rounded off to 1.618.