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a) 42 + 21
62 − 53 = ........................................................
b) 7,4+1,44
0,5·8 = ........................................................
c) 2 1
10 + 3
5 = ................................................... 2 8
18 − 11
6 = ...................................................
d) 14
5 · 5
9 = ................................................... 6
7 : 3
14 = ...................................................