oblicz wartość wyrażenia i wytłumacz:
a) 16,8:(-0,7) : 3 1/3-4 11/12 x 0,8
b)5 1/2-3 x [1 1/4-(-2 2/3)]:[(-0,5):0,25]
a) 16,8:(-0,7) : 3⅓ - 4i11/12 · 0,8 =
= 168:(-7) :10/3 - 4i11/12 · ⅘ = -24 · 3/10 - 59/12 · ⅘ = (skracamy)
= -36/5 -59/15 = -7⅕ - 3i14/15 = -7i3/15 - 3i14/15 = -10i17/15 = -11i2/15
b) 5½ - 3·[1¼ - (-2⅔)]:[(-0,5):0,25] =
= 5½ - 3·(1¼+2⅔):(-50:25)=
= 5½ - 3·(1i3/12 + 2i8/12):(-2)= 5½ - 3· 3i11/12 :(-2) =
= 5½ - 3· 47/12 · (-½) = 5½ - 47/4 · (-½) = 5½ + 47/8 = 5½ + 5⅞ =
= 5i4/8 + 5⅞ = 10i11/8 = 11⅜
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a) 16,8:(-0,7) : 3⅓ - 4i11/12 · 0,8 =
= 168:(-7) :10/3 - 4i11/12 · ⅘ = -24 · 3/10 - 59/12 · ⅘ = (skracamy)
= -36/5 -59/15 = -7⅕ - 3i14/15 = -7i3/15 - 3i14/15 = -10i17/15 = -11i2/15
b) 5½ - 3·[1¼ - (-2⅔)]:[(-0,5):0,25] =
= 5½ - 3·(1¼+2⅔):(-50:25)=
= 5½ - 3·(1i3/12 + 2i8/12):(-2)= 5½ - 3· 3i11/12 :(-2) =
= 5½ - 3· 47/12 · (-½) = 5½ - 47/4 · (-½) = 5½ + 47/8 = 5½ + 5⅞ =
= 5i4/8 + 5⅞ = 10i11/8 = 11⅜