Which expression is not equivalent to the other three?
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7 +0.5 x 4² = 7 +0.5 x 16 = 7 + 8 = 15
2.5 x (16 -2²) = 2.5 x (16 -4) = 2.5 x 12 = 5 x 12/2 = 5 x 6 = 30
(3³ +3)/2 = (27 +3)/2 = 30/2 = 15
(20 +5²)/3 = (20 +25)/3 = 45/3 = 15
2.5 x (16 -2²) = 2.5 x (16 -4) = 2.5 x 12 = 5 x 12/2 = 5 x 6 = 30
(3³ +3)/2 = (27 +3)/2 = 30/2 = 15
(20 +5²)/3 = (20 +25)/3 = 45/3 = 15
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