Oblicz:
(4-1 1/4 :1 9/16)x(-15 5/8)
4/5 - (1,2x 5/12 -0,8):(- 1/8)
-(-(-(-5)))+(-4)x(8-12)-(-(-3))x(-12):(-(-6)) (-99)+97-95+93-91+89-87+85-...-7+5-3+1
Wyznacz brakującą liczbę a.
1 4/5 :[(-1,7)+3,6x a ]=(-3,6)
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(4 -1i1/4:1i9/16) *(-15i5/8)= (4-5/4:25/16)*(-125/8)= (4 -5/4*16/25)*(-125/8)=
= (4 -1/1*4/5)*(-125/8)=(4 -4/5)*(-125/8)= 3i1/5 *(-125/8)= 16/5*(-125/8)=
= 2/1 * (-25/1)= - 50
4/5-(1,2*5/12-0,8):(-1/8)=4/5-(1i 1/5*5/12-4/5):(-1/8)=4/5-(6/5*5/12-4/5):(-1/8)=
= 4/5-(1/1*1/2-4/5):(-1/8)=4/5-(1/2-4/5):(-1/8)= 4/5-(5/10-8/10):(-1/8)=
= 4/5 -(-3/10):(-1/8)= 4/5-(-3/10)*(-8/1)= 4/5-(-3/5)*(-4/1)= 4/5-12/5=
= -8/5= - 1 i 3/5
1i 4/5: [(-1,7)+3,6 *a]= -3,6 /* [(-1,7) +3,6a]
9/5 = -3,6* [(-1,7) + 3,6 a]
9/5 = -36/10 * [(-17/10 + 36/10a]
9/5 = 612/100 - 1296/100a
1296/100 a = 612/100 -9/5
1296/100 a = 612/100 - 180/100
1296/100 a = 432/100 /: 1296/100
a = 432/100 * 100/1296
a = 432/1 * 1/1296
a = 432/1296
a = 1/3