Bardzo proszę o pomoc jest to dla mnie straszliwie ważne .. Dziękuje:)
zadanie1 strona 44... OBLICZ:
a) 19-3/4*6 2/7=
b) 5/6:(1 3/4+2 1/2)=
c) 3,5*1/5+2/7*0,84=
d) (4 1/3-2 1/6):1 5/8=
e) 6,4:2 2/15-24,8:4/5=
f) 2 1/2+3*(6,2+4,8)=
g) 5 3/4*1/23-2 2/7*1/16=
h) 24,75:3/4+5 1/2::2 3/4=
zadanie3 strona 45...OBLICZ:
a) 67+5 1/2+33+4 6/7=
b) 124,8+(-33 1/3)+71,6=
c) 4 2/9+6 4/9=
d) 2,3*2/5*1/23*2,5=
e) 125*(-3,7824)*(-8)=
I to Jakby Co to są zadania z podrećznika pt,,Policzmy to Razem"
do 1 klasy gimnazjum..
Matematyka.
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zad 1
a) 19-3/4*6 2/7= 19 - 3/4 * 44/7 = 19 - 33/7 = 19- 4 5/7 = 14 2/7
b) 5/6:(1 3/4+2 1/2)= 5/6 : (7/4 + 5/2) = 5/6: (7/4 +10/7) = 5/6 : 17/4 = 5/6 * 4/17 = 10/51
c) 3,5*1/5+2/7*0,84= 3 5/10 * 1/5 + 2/7 * 84/100= 35/10 * 1/5 + 2/7 * 84/100 = 7/10 + 12/50 = 35/50 + 12/50 = 47/50
d) (4 1/3-2 1/6):1 5/8= (8/3 - 13/6) : 13/8 = (16/6 - 13/6) : 13/8 = 3/6 : 13/8 = 2/6 * 8/13 = 12/39
e) 6,4:2 2/15-24,8:4/5= 6 4/10 : 32/15 - 24 8/10 : 4/5 = 64/10 * 15/32 - 248/10 * 5/4 = 3 - 31 = 28
f) 2 1/2+3*(6,2+4,8)= 2 1/2 + 3*11 = 2 1/2 + 33 = 35 1/2
g)5 3/4*1/23-2 2/7*1/16= 23/4 * 1/23 - 16/7 * 1/16 = 1/4 - 1/7 = 7/28 - 4/28 = 3/28
h) nie wiem
zad 3
a) 67+5 1/2+33+4 6/7= 67 = 5 7/14 = 33 = 4 12/14 = 109 19/14 = 110 5/14
b)nie wiem
c) 4 2/9+6 4/9= 10 6/9 = 10 2/3
d) 2,3*2/5*1/23*2,5= 2 3/10 * 2/5 * 1/23 * 2 5/10 = 23/10 * 2/5 * 1/23 * 25/10 = 1/10
e) 125*(-3,7824)*(-8)= - 472,8 * (-8) = 3782,4