Study the following counting frame. In the frame, the value of each dot is represented by the number in the box below the dot. For example, the following figure represents the number 154:
·· | ··· | ·· |
64 | 8 | 1 |
What numbers are represented in the frames in (a) and (b)?
a.
··· | ·· | · |
25 | 5 | 1 |
b.
· |
| · | · |
8 | 4 | 2 | 1 |
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