Question

matematyka z plusem 1 gimnazjum str35 zadanie 4

c)2/3x(1/2-11/6)=

d)4,8+1/3x(1,2-0,6)=

e)(1-7/9)x(5,2-0,7)=

f)123:10+0,2x6,1)=

g)(6,5-4,7):(4-2 1/5)=

h)(1,5-1 1/3)x2 2/5-0,1=

i) (6,25-2 1/2):2 1/7-1=

prosze o pomoc na dziś!!!

Answer 1

c)2/3*(3/6-1/6)=2/3*2/6=4/18=2/9

d)4,8+1/3x(1,20,6)=4,8+1/3x6/10=4,8+6/30=48/10+6/30=138/30+6/30=144/30=72/15=4 12/15

e)(1-7/9)*(5,2-0,7)=2/9*45/10=14/5

f)123:10+0,2*6,4=12,3+1,22=13,52

 g)(6,5-4,7):(4-2 1/5)=1,8:1 4/5=18/10*5/9=1

h)(1,5-1 1/3)x2 2/5-0,1=1 5/10-1 1/3*2 2/5-0,1=1 15/30-1 10/30*2 2/5-1/10=5/30*2 2/5-1/10=5/30*12/5-1/10=12/30-1/10=12/30-3/30=9/30=3/10

i) (6,25-2 1/2):2 1/7-1=3,75:15/7-1=375/100*7/15-1=175/100=1,75-1=0,75

Moja ręka! :D

Answer 2

c) 2/3 *(1/2-11/6)= 2/3 *(3/6 -11/6) = 2/3 * 8/6= 16/18 = 8/9

 

d) 4,8 +1/3 *(1,2 -0,6)= 4,8 +1/3* 0,6= 4i4/5 +1/3 *3/5= 4i4/5 +1/1* 1/5=

     = 4i4/5 + 1/5 = 4 i5/5 = 5

 

e) (1-7/9) *(5,2 - o,7)= (9/9 -7/9) *4,5 = 2/9 *4i1/2= 2/9*9/2= 1

 

f) 123: 10 +0,2 *6,1 = 12,3 + 1,22= 13,52

 

g) (6,5 -4,7): (4- 2i1/5) = 1,8 : (4-2,2)= 1,8: 1,8 = 1

 

h) (1,5 -1i1/3)*2i2/5-0,1=(1i1/2-1i1/3) *2,4 -0,1=(1i3/6 -1i2/6)*2,4 - 0,1=   

     = 1/6 * 24/10  - 0,1= 1/1 * 4/10 - 1/10 = 4/10 -1/10 = 3/10

 

i) (6,25 -2i1/2) :2i1/7 -1 = (6,25 -2,5): 15/7 -1 = 3,75 : 15/7 -1= 3i3/4 :15/7-1 =

    = 15/4 * 7/15 -1 = 1/4 *7/1 - 1 = 7/4 -4/4 = 3/4