The word 'sum' means you need to add. If you add 1.22 and 2.3 you get 3.52.
170. 82 + 19 = 101 101 + 21 = 122 122 + 23 = 145 145 + 25 = 170. Difference increases by 2 each time.
145.
0.6897
The idea is to first add 122 + 230 (that's what "the sum of" means). Then, add 5 to the result.
45 + 46 + 47 + 48 + 122 = 308
170. 82 + 19 = 101 101 + 21 = 122 122 + 23 = 145 145 + 25 = 170. Difference increases by 2 each time.
The sum of 237 and 122 is 359.
145.
1 + 5 + 29 + 145 = 145
9 (81 + 64 = 145)
Adding makes more. Subtracting makes less. e.g. 123 +45 168 === which is more that the two initial numbers. 145 -23 122 === which is less than the initial number (145).
The sum of 15 and 107 is 122.
The sum of 67 and 78 is 145.
122
122
0.6897
The idea is to first add 122 + 230 (that's what "the sum of" means). Then, add 5 to the result.