1622. Обчисли:
1) 6,7 • (35,712 : 4,8 + 3,36) = 6,7 • (7,44 + 3,36) = 6,7 • 10,8 = 72,36;
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2) (2,6 • 1,34 – 2,269) : 4,5 = (3,484 – 2,269) : 4,5 = 1,215 : 4,5 = 0,27;
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3) 20,8 : (12 – 11,36) – 8 : 12,5 = 20,8 : 0,64 – 8 : 12,5 = 32,5 – 0,64 = 31,86;
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4) 71,96 – 2,16 • (225,7 : 7,4) = 71,96 – 2,16 • 30,5 = 71,96 – 65,88 = 6,08.
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