{ } Numbers N = W = Z = Q = Natural Numbers 1 2 3 4 5 6 7 8 9 10 …….. Whole Numbers W = 1 2 3 4 5 6 7 8 9 …….. Integers Z = …… -3 -2 -1 1 2 3 4 5 …….. Rational Numbers p { } Q = : p , q both integers , q ≠ 0 q M May

e R Q Z W N Some Rational numbers : 1/2 A Venn Diagram 3 4 7 11 8 3 6 -7 9 Some Rational numbers : R Q Z W N π -2 1/2 e 1 2 6 A Venn Diagram

- calculate ÷ / + divide add subtract multiply times x Sum of Difference between How many? times total of …. Equal shares How much more than? Total when each cost …. … is …. more than … How much for each? How much for …. at … … is …. less than … How much altogether? Fair shares Several at ... How much less than?

Integers -7 + 9 = 2 -1 + 2 = 1 -3 + 5 = 2 -6 + 9 = 3 -16 16 -2 -15 2 -7 + 9 = 2 -1 + 2 = 1 -3 + 5 = 2 -6 + 9 = 3 -16 16 -2 -15 2 -1 + 3 = 2 -5 3 -1 -3 -2 4 -8 + 5 = -3 -8 8 -2 -13 2 -7 + -9 = -2 + -3 = -3 + -5 = 7 + 9 = 1 + 2 = 3 + 5 = -7 - 9 = -2 - 3 = -3 - 5 = -6 - (-9) = -3 - (-2) = -8 - (-5) = 7 - 9 = 1 - 2 = 3 - 5 = 7 + (-9) = 3 + (-1) = 3 + (-5) = -6 - 9 = -1 - 2 = -8 - 5 = -7 - (-9) = -3 - (-1) = -3 - (-5) = 7 - (-9) = 3 - (-1) = 3 - (-5) = -6 + (-9) = -3 + (-2) = -8 + (-5) =

Fractions 4 7 2 7 = 6 7 3 5 3 8 + - 2 5 4 5 24 40 15 40 3 5 5 6 = 13 30 1 = + - + 6 5 1 5 9 40 = = = 1 2 3 1 6 = 5 6 + 3 8 3 4 2 9 7 12 4 9 5 18 = 13 18 + + + 3 8 6 8 8 36 21 36 = + = + 5 6 7 8 = 17 24 1 + 9 8 1 8 = 1 29 36 = = 3 4 9 16 = 5 16 1 +