Tetra 9 lærerveiledning, kapittel 1

Tetra 9. Innled. + Kap 1. 1-61 16.10.06 15:00 Side 46
K 1
Arbeidsark 1:10
Å forenkle uttrykk
Forenkle uttrykkene så mye som mulig.
1 a) 4x – 2x + 3x = ______ b) 4x + 2x – 3x = ______ c) –4x + 2x + 3x = ______
2 a) 2a + b – a + b = ______ b) 2a – b + a – b = ______ c) 2a – b – a + b = ______
3 a) 3xy – xy = ______ b) 3xy + xy – xy = ______ c) 3xy – 2xy – yx = ______
4 a) 3 + a – 2 + 2a = ______ b) a + 3 – 2a + 2 = ______ c) 2a – 3 – a – 2 = ______
Løs opp parentesene og forenkle uttrykkene så mye som mulig.
BOKMÅL
5 x + (x +1) = __________________________________________________________________
6 (1 + x) + 1 = _________________________________________________________________
7 3 + (5 – 2x) + 3x = ___________________________________________________________
8 (2a + 2) + (2a – 2) = __________________________________________________________
9 (3 – a) + (a – 3) = _____________________________________________________________
10 2a – (a + 1) = _________________________________________________________________
11 3x – (1 + 2x) = ________________________________________________________________
12 (4 + 3y) – (2 + 2y) =___________________________________________________________
13 3 – (2 – 2x) = _________________________________________________________________
14 a) (2 – x) – (2 – x) = __________________________________________________________
15 3x + (2x – 7) – (x – 1) = ________________________________________________________
16 3x – (2x – 7) + (x – 1) =_________________________________________________________
17 (x + a) – (x – a) + (x + a) – (x – a)= ______________________________________________
18 (2a – 3b) + (3a – 2b) – (2a + 3b) + (3a – 2b)= _____________________________________
46 Tall og algebra
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