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a)
3/4 + 0,75 * 1 1/3 =
= 3/4 + 3/4 * 4/3 = 3/4 + 1 = 1 3/4
b)
3,7 - 1,2 : 1/2 =
= 3,7 - 1,2 : 0,5 = 3,7 - 2,4 = 1,3
c)
5 * 0,3 + 3 * 2/5 =
= 1,5 + 6/5 = 1,5 + 1,2 = 2,7
d)
1,2 : 1/3 - 1,4 * 2/7 =
= 12/10 * 3 - 14/10 * 2/7 = 4/10 - 2/5 * 1 = 2/5 - 2/5 = 0