Show:
Math Masters
Super Subtractors
Expert Math
Subtraction Stars
100
572 - 251 =
321
100
744 - 521 =
223
100
863 - 533 = 
330


100
926 - 823 =
103
200
645 - 273 =
372
200
718 - 457 =
261
200
648 - 474 =
174
200
853 - 692 =
161
300
458 - 365 =
93
300
534 - 472 =
62
300
822 - 741 =
81
300
644 - 581 =
63
400
683 - 293 =
390
400
649 - 259 =
390
400
633 - 283 =
350
400
835 - 675 =
160
500
603 - 471 =
132
500
503 - 273 =
230
500
805 - 755 =
50
500
503 - 483 =
20