Problem : 65.7 + 3.11 = ?

68.81

Problem : 65.7 - 3.11 = ?

62.59

Problem : 0.0123 + 0.809 = ?

0.8213

Problem : 5.2×3.1 = ?

16.12

Problem : 7.2×0.005 = ?

0.036

Problem : 62.5/0.25 = ?

250