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a) 2 x 22 per 7 x 49 = 308 cm
a. 2 . 22/7 . 49 = 2.22.7 = 308m
c. 2. 3,14 . 5 = 31,4 cm
d. 2.3,14 . 12 = 75,36 cm
g. 2. 22/7 . 28/10 = 44. 4/10 = 17,6 cm
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