幫幫忙...數學功課

Question

1. (3.8)+(-2.58)+9.7
=____________
2. (-3/4))-5/6)+ 5/8 -(-1/4)
=____________
3. 2x+1/3 = x-1/2
=____________
4. After 5 is subtracted from five times a number, the difference is 5 more than that number. Find the number.
5. In a school,65%of the students are boys. If there are 126 girls in the school, what is the total number of students?
106.8+88+27.4+97.6+18.3

Answer 1

1) 10.92
2) -17/24
3) - 5/6