Question

zad.4/27 Matematyka 3

a) 1 7/8 * (-6)=

b) -1 1/5 * 2 1/2=

c) -1 3/4 : 8=

d) 1 1/3 * 0,5=

e) 5,25 : (-1 1/2)=

f) -1,5 : (-2 1/3)=

g) -1 3/4 + 7 1/5=

h) -2 3/8 - 1/12=

i) -13,1 - 2,5=

j) 17,21 - 20,03=

k) -0,82 * (-0,3)=

l) -0,75 - 1 2/3=

np. 1 2/3, to jedna cała i dwie trzecie...

Answer 1

a) 1 7/8 * (-6)= 15/8 * (-6) = -90/8 = -11 2/8 = -11 1/4

b) -1 1/5* 2 1/2= -6/5 * 5/2 = - 30/10 = -3

c) -1 3/4 : 8= -7/8 *1/8= -7/64

d) 1 1/3* 0,5= 4/3* 5/10= 20/30= 2/3

e) 5,25 : (-1 1/2)= 5 1/4 : (-1 1/2)= 21/4 * (-2/3)= -7/2= -3 1/2

f) -1,5 : (-2 1/3)= -(3/2) * (-3/7))= 9/14

g) -1 3/4 + 7 1/5= -7/4 + 36/5= -35/20 + 144/20= 109/20 = 5 9/20

h) -2 3/8 - 1/12= -19/8 - 1/12= -57/24 - 2/24= -59/24= -2 11/24

i) -13,1 - 2,5= -15,6

j) 17,21 - 20,03= -2,82

k) -0,82 * (-0,3)= 0,246

l) -0,75 - 1 2/3= -3/4 - 5/3 = -9/12 - 20/12 = -29/12 = -2 5/12