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b) -0,82 × (-0,3) =0,246
c) -0,75 - (1⅔) =-3/4-(5/3)=-9/12-(20/12)=-29/12
d) -2⅜ - 1/12 =-19/8-1/12=-228/96-8/96=-236/96=-2i44/96=-2i11/24
e) -1¾ + 7⅕ =-7/4+36/5=-35/20+144/20=109/20=5,45
f) -13,1 - 2,5 =-15,6
g) 17,21 - 20,03 =-2,82
h) 5,25 ÷ (-1½) =-3,5