Odpowiedź:
5)
a) 1 2/3 : 2 1/2 + 9 * 1 1/6 = 5/3 : 5/2 + 9 * 7/6 = 5/3 * 2/5 + 3 * 7/2 =
= 1/3 * 2/1 + 21/2 = 2/3 + 10 1/2 = 4/6 + 10 3/6 = 10 7/6 = 11 1/6
b) (1 1/2)² - 1 3/5 : 2 2/3 = (3/2)² - 8/5 : 8/3 = 9/4 - 8/5 * 3/8 = 2 1/4 - 1/5 * 3/1
= 2 1/4 - 3/5 = 2 5/20 - 12/20 = 1 25/20 - 12/20 = 1 13/20
c) 3 1/4 : [(2 5/8 - 1 1/6) : 2 1/2] = 13/4 : [(2 15/24 - 1 4/24) : 5/2] =
= 13/4 : [1 11/24 : 5/2] = 13/4 :{[35/24* 2/5]= 13/4 : [7/12 * 1/1 ] =
= 13/4 : 7/12 = 13/4 * 12/7 = 13/1 * 3/7 = 39/7 = 5 4/7
6)
Adam 48 zl oszczednosci
Sebastian 54 zl oszczednosci
Julia 45 zl oszczednosaci
72 zl * 1/3 = 72/3 = 24 zl Adam dostal od babci
72 zl * 1/4 = 72/4 = 18 zl Sebastian dostal od babci
72 * 3/8 = 9 * 3/1 = 27 zl Jula dostala od babci
48 zl + 24 zl = 72 zl Adam
54 zl + 18 zl = 72 zl Sebastian
45 zl + 27 zl = 72 zl Julia
72 zl - (24 + 18 + 27) = 72 zl - 69 zl = 3 zl tyle zostalo babci
odp. Dzieci po otrzymaniu pieniedzy od babci mialy po 72 zl,
a babci w portfelu pozostalo 3 zl
Szczegółowe wyjaśnienie:
