SZYBKO NA TERAZ
7. Oblicz:
a) 3-5. (2-7) -
.(
b) -(7-3) -10 =
c) 4-(3-1,5)2 =
d) (18+ 2):3+1 -
)



SZYBKO NA TERAZ 7 Oblicz A 35 27 B 73 10 C 43152 D 18 231 class=

Odpowiedź :

Odpowiedź:

a) 3/4-5*(-5)=3/4-(-25)= 3/4 +25= 25 całych i 3/4

b) 3/2 - (-4) -10= 1,5+4-10= 1,5-6= -4,5

c) 4-1,5*2 = 4 -3=1

d)

[tex](1 \frac{3}{8} + 2) \div 3 + 1 = (3 \frac{3}{8} ) \div 3 + 1 = \frac{27}{8} \times \frac{1}{3} + 1 = \frac{9}{8} + 1 = 2 \frac{1}{8} [/tex]

7.

[tex]a) \ \frac{3}{4}-5\cdot(2-7) = \frac{3}{4}-5\cdot(-5) = \frac{3}{4}+25 =25\frac{3}{4}\\\\\\b) \ \frac{3}{2}-(7-3)-10 = 1\frac{1}{2}-4-10 = 1\frac{1}{2}-14 = 1\frac{1}{2}-13\frac{2}{2} = -12\frac{1}{2}\\\\\\c) \ 4-(3-1,5)\cdot2 = 4-1,5\cdot2 = 4-3 = 1\\\\\\d) \ (1\frac{3}{8}+2):3+1 =3\frac{3}{8}:3 + 1 = \frac{27}{8}\cdot\frac{1}{3}+1 = \frac{9}{8}+1 = 1\frac{1}{8}+1 = 2\frac{1}{8}[/tex]