Add
(1) 68.39 + 75.86
Answer: 144.25.
(2) 28.94 + 38.48
Answer: 67.42
(3) 234.75 + 65.85
Answer: 300.6
(4) 346.89 + 578.65
Answer: 925.54
(5) 8.456 + 9.648
Answer: 18.104
(6) 277.99 + 366.88
Answer: 644.87
Add
(7) 6.07, 19.8, 0.59, 129.856
Solution: 6.070 + 19.800 + 0.590 + 129.856
= 156.316.
(8) 28.9, 19.64, 123.697, 0.354
Solution: 28.900 + 19.640 + 123.697 + 0.354
= 172.591