Question

Срочно хелп!!!!! ಠ﹏ಠ​

Answer 1

Ответ:

$1) \: \: \: 0.451 + 42.21 = 42.661 \\ 7.834 + 19.19 = 27.024 \\ 47.189 + 4.11 = 51.299 \\ 32.1 - 3.57 = 28.53 \\ 27.14 - 9.58 =15.56 \\ 72.37 - 19.5 = 52.87$

$2) \: \: \: \: 7.7 + 15.6 + 4.4 + 9.3 = (7.7 + 9.3 )+ (15.6 + 4.4) = 17 + 20 = 37 \\ 5.32 + 1.24 + 3.68 + 18.76 = (5.32 + 3.68) + (18.76 + 1.24) = 9 + 20 = 29 \\ 3.598 + 5.146 + 6.402 + 4.854 = (3.598 + 6.402) + (5.146 + 4.854) = 10 + 10 = 20$