PMR Question Module Chapter 1 Form 2 2011
PMR questions. 1. Calc Calcul ulat ate e the the val value ue of of 1 1 ⎞ and −0.8 − ⎛ ⎜⎝ − 2 + 5 ⎟ ⎠
express the answer as a decimal.
⎛ 1 1 ⎞ −0.8 − ⎜ − × + × ⎟ ⎝ 2 × 5 × ⎠ ⎛ −5 + 2 ⎞ = −0.8 − ⎜ ⎝ 10 ⎟ ⎠ ⎛ 3 ⎞ = −0.8 − ⎜ − ⎝ 10 ⎟ ⎠ = −0.8 − ( −0.3) = −0.8 + 0.3 = −0.5 5
=
2
5
4.26
1 ⎞ and × 0.8 − ⎛ ⎜⎝ −1 2 ⎟ ⎠
express the answer correct to two decimal places. ⎛ 1 ⎞ = 4.26 × 0.8 − ⎜ −1 ⎟ ⎝ 2 ⎠
⎛ 3 ⎞ ⎝ 2 ⎟ ⎠ = 3.408 − ( −1.5 ) =
3.408 − ⎜ −
=
3.408 + 1.5
=
4.908
=
4.91 (2dp)
14 − (−0.6) ÷
2 3
14 − (−0.6) ÷
14 − (−0.9)
=
14 + 0.9
=
14.9
.
3 3 21
4. Calc Calcul ulat ate e the the val value ue of of −24 ÷ 8 − 14 . = −24 ÷ 8 − 14 =
−3 − 14 −17
2
+
(−0.46)
and express the answer as a decimal. =
0.52 − 2 ÷ 0.52 − 2 ×
1 2 2
+
(−0.46)
+ ( −0.46) 1 = 0.52 − 4 − 0.46 =
= −
3.94
2. Calc Calcula ulate te the the val value ue of of 7 1 ⎞ and −1.5 − ⎛ ⎜⎝ − 10 + 2 ⎟ ⎠
express the answer as a decimal.
⎛ 7 1 ⎞ −1.5 − ⎜ − + × ⎟ ⎝ 10 2 × ⎠ ⎛ −7 + 5 ⎞ = −1.5 − ⎜ ⎝ 10 ⎟ ⎠ ⎛ 2 ⎞ = −1.5 − ⎜ − ⎝ 10 ⎟ ⎠ = −1.5 − ( −0.2 ) = −1.5 + 0.2 = −1.3 =
5
5
express the answer as a decimal.
⎛ 1 3 ⎞ −0.6 − ⎜ ×2 − ⎟ ⎝ 2 ×2 4 ⎠ ⎛ 2 − 3 ⎞ = −0.6 − ⎜ ⎝ 4 ⎟ ⎠ ⎛ 1 ⎞ = −0.6 − ⎜ − ⎝ 4 ⎟ ⎠ = −0.6 − ( −0.25) = −0.6 + 0.25 = −0.35 =
2
14 − (− 0.6 ) ×
=
=
0.52 − 2 ÷
1
1 3 ⎞ and −0.6 − ⎛ − ⎜ 2 4 ⎟ ⎝ ⎠
0.3
=
1. Calc Calcula ulate te the the val value ue of of
3. Calc Calcula ulate te the the val value ue of of
3. Calc Calcul ulat ate e the the val value ue of of
=
4. Calc Calcula ulate te the the value value of
Module questions.
2
2. Calc Calcul ulat ate e the the val value ue of of
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Mathematics : Directed Numbers
32.4 − (−6.75) ÷
2 5
and
express the answer correct to two decimal places. 2 = 32.4 − (−6.75) ÷ 5 5 = 32.4 − (−6.75) × 2 = 32.4 − (−16.875) =
32.4 + 16.875
=
49.275
=
49.28 (2dp)
5. Calc Calcula ulate te the the value value of 6.75
4 ⎞ and × 3.5 − ⎛ − 1 ⎜ 5 ⎟ ⎝ ⎠
express the answer correct to two decimal places. ⎛ 4 ⎞ = 6.75 × 3.5 − ⎜ −1 ⎟ ⎝ 5 ⎠
⎛ 9 ⎞ ⎝ 5 ⎟ ⎠ = 23.625 − ( −1.8 ) =
23.625 − ⎜ −
=
23.625 + 1.8
=
25.425
=
25.43 (2dp)
6. Calc Calcula ulate te the the value value of (a) 3 − (−1.8) ÷ 3
1 3
=
3 − (−1.8) ÷
=
3 − (−1.8) ×
=
3 − (−0.54)
=
3 + 0.54
=
3.54
(b) −19 × (−2) + 14 =
38 + 14
=
52
10 3 3 10
