Question

4,8+1/3*(1/2-0,6)=

(1-7/9)*(5,2-0,7)=

123:10+0,2*6,1=

(6,5-4,7):(4-2i1/5)=

(6,25-2i1/2):2i1/7-1=

SZYBKO Z OBLICZENIAMI

Answer 1

4,8+1/3*(1/2-0,6) =
= 4,8 + 1/3 * ( 0,5 - 0,6) = 
= 4,8 + 1/3 * (-0,1) = 
= 4,8 + 1/3 * (-1/10) = 
= 48/10 + (-1/30) = 
= 144/30 - 1/30 = 
= 143/30 = 
= 4 i 23/30
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(1-7/9)*(5,2-0,7) = 
= (9/9 - 7/9) * 4,5 = 
= 2/9 * 45/10 =

= 1
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123 : 10 + 0,2 * 6,1 =
= 12,3 + 1,22 = 
= 13,52
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(6,5-4,7):(4-2i1/5)=
= 1,8 : ( 4 - 2,2) = 
= 1,8 : 1,8 = 
= 1
=========================
(6,25-2i1/2):2i1/7-1=
= (6,25 - 2,5) : 2 i 1/7 - 1 =
= 3,75 : 2 i 1/7 - 1 = 
= 375/100 : 15/7 - 1 =
= 375/100 * 7/15 - 1 =
= 175/100 - 1 = 
= 1 i 3/4 - 1 = 
= 3/4