Question

Musze miec obliczenia, nie same wyniki ;) a) -1,5+2 2/9* 0,9= b)(2/3- 1,2): 2/3 c)3,6: (-4/9)+ (-1,9) d)-1,5: (-0,2)+ 2: (-1/2<do potegi 2)= e)(-4/5+0,5)*2/3+0,8 f)10,4+ 3 3/7* (-2,8)

Answer 1

a)

-1,5+2 2/9* 0,9=-1,5+20/9*9/10=-1,5+2=0,5

b)

(2/3- 1,2): 2/3=(2/3+1 2/10):2/3=(20/30+1 6/30):2/3=

=1 26/30:2/3=56/30*3/2=28/10=2 8/10=2,8

c)

3,6: (-4/9)+ (-1,9)=36/10:(-4/9)+(-1,9)=

=36/10*(-9/4)+(-1,9)=-81/10+(-1,9)=-8,1+(-1,9)=-10

d)

-1,5: (-0,2)+ 2: (-1/2²)=7,5+2:1/4=7,5+2*4/1=7,5+8=15,5

e)

(-4/5+0,5)*2/3+0,8=(-4/5+1/2)*2/3+0,8=

=(-8/10+5/10)*2/3+0,8= -3/10*2/3+0,8=

=-1/5+8/10=-2/10+8/10=6/10=3/5=0,6

f)

10,4+ 3 3/7* (-2,8)=10,4+24/7*(-28/10)=

=10,4+48/5=10,4+9 3/5=10,4+9,6=20