+ 127
= 125
+ 107
= 109 1724
+
= 245
−7 9
= 1 9
2536
−1236
= 1625
−
= 251
+ 143
+ 141
= 145 1427
−
− 274
= 271
1115
+
+ 152
= 152 3740
−1740
−
= 1− 403
− 135
= 134 15
−8
−7 8
=3 8
7 |
5 |