Ответ:
а)
- \(3.4 + 2.5 = 5.9\);
- \(17.2 + 2.8 = 20\);
- \(5.9 + 3.7 = 9.6\);
- \(4.587 + 7.64 = 4.587 + 7.640 = 12.227\).
б)
- \(5.7 - 1.3 = 4.4\);
- \(8 - 3.4 = 4.6\);
- \(12.3 - 1.8 = 10.5\);
- \(10.273 - 5.49 = 10.273 - 5.490 = 4.783\).
в)
- \(2.4 \cdot 3 = 7.2\);
- \(3.02 \cdot 7 = 21.14\);
- \(2.6 \cdot 3.7 = 9.62\);
- \(4.5 \cdot 2.06 = 9.27\).
г)
- \(3.5 : 7 = 0.5\);
- \(8.4 : 4 = 2.1\);
- \(60.8 : 1.9 = 32\);
- \(20.52 : 3.8 = 5.4\).
Ответ: а) 5,9; 20; 9,6; 12,227. б) 4,4; 4,6; 10,5; 4,783. в) 7,2; 21,14; 9,62; 9,27. г) 0,5; 2,1; 32; 5,4.
