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b. 3,5 + 0,8 = 4,3
c. 5 1/3 - 2 5/8 = 5 8/24 - 2 15/24 = 2 32/24 - 2 15/24 = 17/24
d. 9,4 - 4,9 = 4,5
e. 4 2/3 * 2 2/5 = 14/3 * 12/5 = 56/5 = 11,2
f. 0,3 * 1,3 = 0,36
g. 9 1/5 : 2 5/9 = 46/5 : 23/9 = 46/5 * 9/23 = 18/5 = 3,6
h. 5,4 : 0,06 = 5 4/10 : 6/100 = 54/10 * 100/6 = 90