10 minutes before 9 is 8:50. since any time on the hour is at a perfect 60 minutes, you subtract the minutes given and move 1 hour back to find your answer.
for example, if you were asked what 20 minutes before 10 was. you start by subtracting 20 from 60. 60-20= 40, this being your minutes. 10-1 is 9, this being your hour, making the final answer 9:40.
Pretty sure it’s the second answer
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Simple..
Number of children on Saturday= 37
Number of children on Sunday= 25
Now add 37+25 which is 62
There were 62 children on those 2 days
Hope This Helps!