7. Oblicz:
3
4
-
-
a) -5. (2 - 7) =
b) 3 -(7 - 3) - 10 =
c) 4-(3-1,5)2 =
d) (13 +2):3+1 =
:
8



7 Oblicz 3 4 A 5 2 7 B 3 7 3 10 C 43152 D 13 231 8 class=

Odpowiedź :

[tex]a) \frac{3}{4} - 5 \times (2 - 7) = \frac{3}{4} - 5 \times 5 = \frac{3}{4} - 25 = - 24 \frac{1}{4} [/tex]

[tex]b) \frac{3}{2} - (7 - 3) - 10 = \frac{3}{2} - 4 - 10 = \frac{3}{2} - 14 = - 12 \frac{1}{2} [/tex]

[tex]c)4 - (3 - 1.5) \times 2 = 4 - 1.5 \times 2 = 4 - 3 = 1[/tex]

[tex]d)(1 \frac{3}{8} + 2) \div 3 + 1 = 3 \frac{3}{8} \div 3 + 1 = \frac{9}{8} + 1 = 2 \frac{1}{8} [/tex]