Page 22 - aljaber

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18 − (6 × 3) − 4 = 18 − 18 − 4 = 0 − 4 = −4 ()
()
(12 × 3) ÷ (12 ÷ 3) × 2 =  36 ÷ 4  × 2 = 9 × 2 = 18
()
. (3 + 8) − 5 = 11 − 5 = 6 = 1

3 + (8 − 5) 3 + 3 6

(.)

[Fractions and Rational Numbers]

.

ba a:

: b

.b =/ 0

3.6 15 30% 0 −4 3
7
15 = 15 −4 = − 4 3 = 3
77 :a 11

.b b .b
:
. 3.6 = 36 a 30% = 30 0 = 0
100 1
10
a .b ≠ 0 a
b

a

b

. 25 1 3 b a
b a
37 2 4
b
.− 5 16 5 a
a
3 11 3 b