标准：
Tell and write time in hours and half-hours using analog and digital clocks, and measure elapsed time to the hour on the hour using a predetermined number line. (1.MDR.6.2.)
学生说明
1. Click .
2. Use to drag the clock to the correct time.
3. Click to check your answer.
4. Click when you have finished all pages.
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.
2. Use 
to drag the clock to the correct time.
3. Click 
to check your answer.
4. Click 
when you have finished all pages.
