mb(TDS)Ti89, hp '42S,35S'35, Code'Operatio' Exampl 'RPN'[SWAP Stack X<=>Y(►'STO' @ hp 50G:49G)or Comma Key @ hp Prime],Tuto

9 + 8 + 7 – (6) = 18 (A)
(i) (ii) (iii) (iv)
6 6 6 6
ENTER ENTER ENTER ENTER
9 CHS CHS 7
ENTER 7 9 x<>y
8 + + –
+ 8 8 8
7 + + +
+ 9 7 9
x<>y + + +
–
Answer: Answer: Answer: Answer:
18 18 18 18
9 + 8 – 7 – (6) = 4 (B)
(i) (ii) (iii) (iv) (v) (vi)
6 6 6 6 6 6
ENTER ENTER ENTER ENTER ENTER ENTER
9 CHS CHS CHS 7 7
ENTER 7 7 9 CHS x<>y (wrong!)
8 CHS – + x<>y –
+ + 8 8 – 8
7 8 + + 8 x<>y (wrong!)
– + 9 7 + –
x<>y 9 + – 9 9
– + + +
Answer: Answer: Answer: Answer: Answer: Answer:
4 4 4 4 4 16 (wrong!)
9 + 8 – 7 + (6) = 16 (C)
(i) (ii) (iii) (iv) (v)
6 6 6 6 6
ENTER ENTER ENTER ENTER ENTER
9 7 7 9 7
ENTER CHS – + + (wrong!)
8 + 8 8 8
+ 8 + + x<>y (wrong!)
7 + 9 7 –
– 9 + – 9
+ + +
Answer: Answer: Answer: Answer: Answer:
16 16 16 16 4 (wrong!)
9 – 8 + 7 + (6) = 14 (D)
(i) (ii) (iii) (iv) (v)
6 6 6 6 6
ENTER ENTER ENTER ENTER ENTER
9 7 7 9 7
ENTER + + + +
8 8 8 8 8
– CHS – – + (wrong!)
7 + 9 7 9
+ 9 + + x<>y (wrong!)
+ + –
Answer: Answer: Answer: Answer: Answer:
14 14 14 14 –12 (wrong!)