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1/2 + 0,7 = 1/2 + 7/10 = 5/10 + 7/10 = 12/10 = 1 2/10 = 1 1/5
lub 1/2 + 0,7 = 0,5 + 0,7 = 1,2
b)
2/3 - 4/5 = 10/15 - 12/15 = - 2/15
c)
1/4 : 0,5 = 1/4 : 5/10 = 1/4 : 1/2 = 1/4 * 2 = 2/4 = 1/2
lub 1/4 : 0,5 = 0,25 : 0,5 = 0,5
d)
2,4 * 2/3 + 0,4 = 24/10 * 2/3 + 4/10 = 8/5 + 4/10 = 16/10 + 4/10 = 20/10 = 2
b)
c)
d)