| 70 + 40 = | 80 + 90 = | 170 + 40 = | 450 + 60 = |
| 73 + 40 = | 80 + 94 = | 176 + 40 = | 450 + 63 = |
| 73 + 45 = | 85 + 94 = | 176 + 41 = | 453 + 63 = |
82 + 57 |
= |
80 + 50 |
+ |
2 + 7 |
= |
130 |
+ |
= |
||
74 + 62 |
= |
(70 + ) |
+ |
(4 + ) |
= |
+ |
6 |
= |
||
96 + 51 |
= |
( + 50) |
+ |
( + 1) |
= |
+ |
= |
|||
47 + 71 |
= |
( + ) |
+ |
( + ) |
= |
+ |
= |
|||
65 + 83 |
= |
( + ) |
( + ) |
= |
+ |
= |
| 75 + 61 = 76 + | 64 + 55 = + 50 | 280 + = 278 + 46 |
| 84 + 98 = + 100 | 97 + 42 = 100 + | 198 + 25 = + 200 |
| 73 + 52 = | 167 + 52 = | 68 + 70 = | 83 + 45 = |
| 84 + 52 = | 152 + 67 = | 70 + 69 = | 283 + 545 = |
280 + 36 + 20 = 300 + =
73 + 640 + 60 = 73 + =
890 + 10 + 87 = + 87 =
46 + 150 + 450 = + =
146 + 250 + 450 = ( 450 + ) + 146 = + 146 =
1800 + 194 + 200 = ( + ) + 194 = + =
93 + 185 + 7 = + ( + ) = + =
| 280 + 470 + 20 + 130 = | 298 + 475 + 3 + 2 = |
| 420 + 160 + 40 + 80 = | 2700 + 534 + 300 + 6 = |
| 350 + 14 + 90 + 210 = | 17 + 87 + 23 + 13 + 49 = |
80 + 90 + 100 + 110 + 120 =
280 + 290 + 300 + 310 + 320 =
98 + 99 + 100 + 101 + 102 + 103 =
7 + 14 + 21 + 28 + 35 + 42 + 49 + 56 =