Question

Urgent!!!!!!Dau 20 de puncte +Efectuați calculele:-3/8+2/8 b)-7/9+(-2/9) c)+1/10+(-31/10) d)1/2+(-3/4) e)-1/4+(-3/8) f)-1/3+(-5/6)+(-7/18) g)-0,75+1,25 h)-2,6+(-1,4) i)-1/4+0,125 ​

Answer 1

a) -3/8+2/8 = (-3+2)/8 = -1/8

b) -7/9+(-2/9) = (-7-2)/9 = -9/9 = -1

c) 1/10+(-31/10) = (1-31)/10 = -30/10 = -3

d) ²⁾1/2+(-3/4) = 2/4-3/4 = -1/4

e) ²⁾-1/4+(-3/8) = -2/8-3/8 = -5/8

f) ⁶⁾-1/3 + ³⁾(-5/6) + (-7/18) = -6/18-15/18-7/18 = -28/18⁽² = -16/9

g) -0,75+1,25 = -75/100+125/100 = 50/100 = 1/2

h) -2,6+(-1,4) = -26,10-14/10 = -40/10 = -4

i) -1/4+0,125 = -1/4+125/1000⁽¹²⁵ = ²⁾-1/4+1/8 = -2/8+1/8 = -1/8