Question

7. Calculează:
83
71
100
25
100
38
100
25
100
43
100
48
100
54
100
100
48
100
19
100
11
100
100
25
100
50
100
36 18
100 100
67
100​

Answer 1

7. a)

$\frac{71}{100} - \frac{25}{100} = > \frac{71 - 25}{100} = \frac{46}{100}$

b)

$\frac{83}{100} - \frac{38}{100} - \frac{25}{100} = > \frac{83 - 3 8 - 25}{100} = \frac{20}{100}$

c)

$\frac{43}{100} + \frac{48}{100} - \frac{54}{100} = > \frac{43 + 48 - 54}{100} = \frac{37}{100}$

d)

$\frac{48}{100} - \frac{19}{100} = > \frac{48 - 19}{100} = \frac{29}{100}$

e)

$\frac{100}{100} - \frac{25}{100} - \frac{50}{100} = > \frac{100 - 25 - 50}{100} = \frac{25}{100}$

f)

$\frac{36}{100} - \frac{18}{100} + \frac{67}{100} = > \frac{36 - 18 + 67}{100} = > \frac{85}{100}$

8. a)

$x + \frac{25}{100} = \frac{58}{100} = > x = \frac{58}{100} - \frac{25}{100} = > x = \frac{58 - 25}{100} = > x = \frac{33}{100}$

b)

$\frac{100}{100} - x = \frac{25}{100} = > x = \frac{100}{100} - \frac{25}{100} = > x = \frac{100 - 25}{100} = > x = \frac{75}{100}$

c)

$\frac{75}{100} - x = \frac{37}{100} = > x = \frac{37}{100} + \frac{75}{100} = > x = \frac{37 + 75}{100} = > x = \frac{112}{100}$

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