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The addition and subtraction of rational numbers in the first day of junior high school Xiao Ming plans to do five math problems every day during the holiday. If he has more than one problem, he will write a positive number. If he has less than one problem, he will write a negative number. The number of problems in ten days is recorded as follows: 3.5, - 4.2, - 1.7,0, - 3.8,10. Q: how many math problems did Xiao Ming do in ten days?
5*10+3+5-4+2-1+7+0-3+8+10
=77
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