On Monday, the team of street sweepers cleaned 98 city blocks. On Tuesday, they cleaned half as many blocks as on Monday.
To find the number of blocks cleaned on Tuesday, we calculate:
\[ \text{Blocks cleaned on Tuesday} = \frac{1}{2} \times 98 \]
Calculating the above:
\[ \frac{1}{2} \times 98 = \frac{98}{2} = 49 \]
Thus, the street sweepers cleaned 49 city blocks on Tuesday.