Double Zero
200 - 100 =
100
82 - 11
71
85 + 12 =
97
100 + 100 = 200
200 - 100 = 100
______ + 10 = 54
44
300 - 150 =
150
115 - 10 =
105
620 + 48 =
668
132 - 20 = 112
112 + 20 = 132
or
20 + 112 = 132
129 - _______ = 89
40
400 -283 =
117
864 -415
449
789 + 199 =
988
625 - 102 =
593 + 102 = 625
or
102 + 593 = 625
199 + ____________ = 379
180
600- 457 =
143
598 - 329
269
754 + 169 =
923
554 + 288 =
842 -554 = 288 or
842 - 288 = 554
__________ = 929 - 554
375
900 - 739 =
161
624 - 193
431
398 + 592 =
990
929 - 137 =
792 + 137 = 929
or
137 + 792 = 929
___________ = 786- 298
488