Matematyka

Autorzy:Ewa Duvnjak, Ewa Kokiernak-Jurkiewicz

Wydawnictwo:WSiP

Rok wydania:2015

Wykonaj działania 4.37 gwiazdek na podstawie 8 opinii
  1. Gimnazjum
  2. 1 Klasa
  3. Matematyka

`a)\ -12,4-2,4:(-2 2/3)+2 2/3*(-0,9)-0,1=`

`\ \ \ =-12,4-24/10:(-8/3)+8/strike3^1*(-strike9^3/10)-0,1=`

`\ \ \ =-12,4-strike12^3/5*(-3/strike8^2)+(-24/10)-0,1=`

`\ \ \ =-12,4-(-9/10)-2,4-0,1=`

`\ \ \ =-12,4+0,9-2,4-0,1=`

`\ \ \ =-11,5-2,5=-14`

 

`b)\ -[-(-7 1/3):1,1-1,1*6 2/3]+4 1/6*(-4)=`

`\ \ \ =-[7 1/3:11/10-11/strike10^1*strike20^2/3]+25/strike6^3*(-strike4^2)=`

`\ \ \ =-[strike22^2/3*10/strike11^1-22/3]+(-50/3)=`

`\ \ \ =-[20/3-22/3]-50/3=`

`\ \ \ =-[-2/3]-50/3=2/3-50/3=-48/3=-16`

 

`c)\ 0,024*(-3 1/3):0,004-[-1 1/7*(-5 5/8+2 1/8:1,7)]=`

`\ \ \ =strike24^8/strike1000^100*(-strike10^1/strike3^1):4/1000-[-8/7*(-45/8+17/8:17/10)]=`

`\ \ \ =-strike8^2/strike100^1*strike1000^10/strike4^1-[-8/7*(-45/8+strike17^1/8*10/strike17^1)]=`

`\ \ \ =-20-[-8/7*(-45/8+10/8)]=`

`\ \ \ =-20-[-strike8^1/7*(-35/strike8^1)]=`

`\ \ \ =-20-35/7=-20-5=-25`

 

`d)\ 40-2 4/7:[-0,12+(-3/4):12,5]*(-1,4)=`

`\ \ \ =40-18/7:[-0,12+(-0,75):12,5]*(-14/10)=`

`\ \ \ =40-18/7:[-0,12-75:1250]*(-7/5)=`

`\ \ \ =40-18/7:[-0,12-75/1250]*(-7/5)=`

`\ \ \ =40-18/7:[-0,12-3/50]*(-7/5)=`

`\ \ \ =40-18/7:[-0,12-0,06]*(-7/5)=`

`\ \ \ =40-18/7:(-0,18)*(-7/5)=`

`\ \ \ =40-18/7:(-18/100)*(-7/5)=`

`\ \ \ =40-18/strike7^1*(-100/18)*(-strike7^1)/5=`

`\ \ \ =40-strike18^1*100/strike18^1*1/5=`

`\ \ \ =40-100/5=40-20=20`