Question

Wykonaj dzialania
a) -4×(2⅛)=
b)2¼÷(-1½)
c)-1,21+5,1
d)-3,24 ×(-0,2)
e)0,24÷(-o,4)
f)2¾×(-0,5)
h)-2,3-⅓
g)-3,75÷(-1¼)
j)⅓÷(-0,7)

Answer 1

a) -4×(2⅛)=-4 × 17/8 = - 17/2 = -8,5
b)2¼÷(-1½)=9/4 ÷ (-3/2) =9/4 × (-2/3) = -3/2 = -1,5
c)-1,21+5,1=3,89
d)-3,24 ×(-0,2)=32,4 × 2 = 64,8
e)0,24÷(-o,4)=25/100 × (-10/4) = - 25/40
f)2¾×(-0,5)=11/4×(-1/2)=-11/8
h)-2,3-⅓ = -23/10 - 1/3 = -69/30 - 10/30 = -79/30
g)-3,75÷(-1¼)=-3¾÷(-1¼)=-15/4 ÷ (-5/4) = -15/4 × (-4/5) = -3
j)⅓÷(-0,7)=1/3 × (-10/7) = - 10/21

Answer 2

A) -4×(2⅛)= -4*17/8= -8 1/2
b)2¼÷(-1½) = -1 1/2
c)-1,21+5,1 =3,89
d)-3,24 ×(-0,2)= 0,648
e)0,24÷(-o,4)= -0,60
f)2¾×(-0,5)= -1,375
h)-2,3-⅓= -2,63
g)-3,75÷(-1¼)=3
j)⅓÷(-0,7)=-0,476

Answer 3

A) -4×(2⅛)= -4 x 17/8 = -17/2 = -8 1/2
b)2¼÷(-1½) = 9/4 : (-3/2)= 9/4 x (-2/3)= -3/2= -1 1/2
c)-1,21+5,1= 3,89
d)-3,24 ×(-0,2)= 0,648
e)0,24÷(-o,4)= -0,6
f)2¾×(-0,5)= 11/4 x (-1/2)= -11/8= -1 3/8
h)-2,3-⅓= -2 3/10 - 1/3= -2 9/30 - 10/30= -2 19/30
g)-3,75÷(-1¼)= -3,75: (-1,25)= 3
j)⅓÷(-0,7)= 1/3: (-7/10)= 1/3 x (-10/7)= -10/21