Вычесли 7дм8см-2см = 67см+2см= 6дм7см+3дм= 8дм5см-3дм= 5дм3см-3дм= 9дм3см-6дм=
166
500
Ответы на вопрос:
2b - b • 2/5 =
= 2b - 2b/5 =
= 10b/5 - 2b/5 = 8b/5
b = 4 3/5
8b/5 = (8 • 4 3/5) / 5 =
= 8 • 23/5 : 5 =
= 8 • 23/25 = 184/25 = 7 9/25
= 2b - 2b/5 =
= 10b/5 - 2b/5 = 8b/5
b = 4 3/5
8b/5 = (8 • 4 3/5) / 5 =
= 8 • 23/5 : 5 =
= 8 • 23/25 = 184/25 = 7 9/25
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