Question

Oblicz potęgi

7²=

1²=

10²=

11²=

12²=

13²=

14²=

15²=

zad.2
oblicz

1/2 - 3/4=

3/5 - 2/7 =

- 1/2 - (-1/3) =

- 7/9 -(- 8/5)=

-13/11 - (- 11/6)=

- (1/2 - 1/3 - ( 1/4 -1/5)=

Answer 1

7² = 7 · 7 = 49

1² = 1 · 1 = 1

10² = 10 · 10 = 100

11² = 11 · 11 = 121

12² = 12 · 12 = 144

13² = 13 · 13 = 169

14² = 14 · 14 = 196

15² = 15 · 15 = 225

Zad 2

1/2 - 3/4 = 2/4 - 3/4 = -1/4

3/5 - 2/7 = 21/35 - 10/35 = 11/35

-1/2 - (-1/3) = -1/2 + 1/3 = -3/6 + 2/6 = -1/6

-7/9 - (-8/5) = -7/9 + 8/5 = -35/45 + 72/45 = 37/45

-13/11 - (-11/16) = -13/11 + 11/16 = -208/176 + 121/176 = - 87/176

-(1/2 - 1/3 - (1/4 - 1/5)) = -(1/2 - 1/3 - (5/20 - 4/20)) = -(1/2 - 1/3 - 1/20) =

= -(30/60 - 20/60 - 3/60) = -7/60

Answer 2

14
1
100
121
144
169
196
225

z.2

-1/4
11/35
-1/6
37/45
43/66
-13/60