Rozwiąże ktos te działania z obliczeniami ?
a. 7 8/5 x (5/2 - 3/5) + 2 1/5 = ?
b. 3 8/12 : (2 1/2 + 4/5) = ?
c. (1/8 + 1/16) : 2/5 + 1/2 = ?
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a. 7 8/5 x (5/2 - 3/5) + 2 1/5 = 7 8/5 x 1 9/10 + 4 1/5= 16,44 + 2,2 = 18,64
a) 7i8/5 *(5/2 -3/5) +2i1/5 = 43/5 *(25/10 -6/10) +2i1/5= 43/5 *19/10 +2i1/5 = = 817/50 +2i1/5= 16i17/50 +2i10/50 = 18i27/50
b) 3i8/12 :(2i1/2 +4/5)= 44/12 :(2i5/10 + 8/10)= 44/12 :2i13/10= 44/12: 33/10 = = 44/12 * 10/33= 4/6 *5/3= 20/18 = 1i2/18= 1i1/9
c) (1/8 +1/16):2/5+1/2=(2/16 +1/16):2/5+1/2=3/16*5/2+1/2= 15/32+16/32= 31/32