Question

Вычислите:
а) - 3,28 × ( - 2,5)
б) 30/31 × ( - 1,24)
в) 3,84 : ( - 1,6)
г) - 5 1/3 : ( - 3 5/9)
Сравните:
а) 0,7 (4) и 11/15
б) 2 17/40 и 2,4 (25)

Answer 1

-3,28 *(-2.5) = 8.2
30/31 * (-1.24) = -(30/31 * 124/100) = -(3/1 * 4/10) = -12/10 = -1.2
3.84 / (-1.6) = -2.4
-5  1/3 : (-3  5/9) = 16/3 : 32/9 = 16/3 * 9/32 = 3/2 = 1.5
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11/15 = 0.7(3)
0.7(4)>0.7(3)
0.7(4) > 11/15
2  17/40  = 2.425
2.425<2.4(25)
2  17/40<2.4(25)