600
6
60
6,000
900
9
9,000
90
234, 930, 21, 309
21, 234, 309, 930
930, 309, 234, 21
21, 930, 309, 234
Partition the square into 4 rows and 5 columns.
You can use scrap paper to help solve the problem! What is the difference (ANSWER) for 990-122=?
872
868
990
122