Question

Округли. a) До десятків: 99 =, 35 ≈,39 =, 54 =,23=, 152 =, 311 ≈, 153 =, 2 009 ≈, 1866 ≈,1 155 ≈, 817 ≈,​

Answer 1

99 = 100, 35 ≈ 40, 39 = 40, 54 = 50, 23 = 20, 152 = 150, 311 ≈ 310, 153 = 150, 2 009 ≈ 2 010, 1866 ≈ 1870, 1 155 ≈ 1 160, 817 ≈ 820.