Math Error Analysis Kai Cheng 19

Diagnostic Test 2 Q4 (c)

QD
Line 1 (Carelessness): 2(11/9) =2x2.
Line 2 (Conceptual) :(-) x (-) = (+), not (-), and it is multiplication, not addition.

QE
Line 1 Conceptual): 2 (11-9) = 2(2), not 22-18.You have to do the bracketed formulas first.

QF
Line 2 (Conceptual):2 (11-9) =2(2), not 22-18, because the bracketed formulas must be done first, same goes for the 16 (-1/2)^2, you have to get (-1/2)^2 first.

Diagnostic Test 2 Q4 (cd)

QA
Line 1( Carelessness): 2/3 x 1/4 should be = to 1/6.
Line 2 (Carelessness): -1/2 / 1/6= -3

QB
Line 2 (Conceptual): -1/2 / 1/6 = 3

QC
Line 1( Conceptual):1/2 - 1 = (-1)
                                2/3 x 1/4 = 1/6

QD
Line 4(Conceptual) :-1/2 / 1/6 = 1/2 x 6/1, you must flip the second number.

QE
Line 2 (Carelessness) :-0.5 / 0.5/3= -3