exercitiul 3 va rog dau coroana
Răspunsuri la întrebare
Răspuns
Explicație pas cu pas:
3)
a) 3 / 11 + 5 / 22 + 15 / 44 = 12 / 44 + 10 / 44 + 15 / 44 = 37 / 44
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b) 7 / 10 + 3 / 100 + 5 / 1 000 =
= (700 + 30 + 5 ) / 1 000 = 735 / 1 000= 147/200
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c) 30 / 45 + 98 / 56 + 21 / 35 =
= 2 / 3 + 7 / 4 + 3 / 5 =
= 40 / 60 + 105 / 60 + 36 / 60 =
= 181 / 60 = 3 intregi si 1 / 60
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d) 15 / 75 + 35 / 25 + 24 / 40 =
= 1 / 5 + 7 / 5 + 3 / 5 =
= 11 / 5
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e) 3 / 32 + 5 / 24 + 7 / 16 =
= 9 / 96 + 20 / 96 + 42 / 96 =
= 71 / 96
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f) 6 / 13 + 16 / 26 + 35 / 65 =
= 6 / 13 + 8 / 13 + 7 / 13 =
= ( 6 + 8 + 7 ) / 13 =
= 21 / 13 =
= 1 intreg si 8 / 13
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g) 7 / 10 + 5 / 100 + 3 / 20 =
= 7 / 10 + 1 / 20 + 3 / 20 =
= ( 14 + 1 + 3 ) / 20 =
= 18 / 20 =
= 9 / 10
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h) 4 / 3 + 24 / 36 + 16 / 24 =
= 4 / 3 + 2 / 3 + 2 / 3 =
= ( 4 + 2 + 2 ) / 3 =
= 8 / 3 =
= 2 intregi si 2 / 3