S Subtracting across zeroes
__1. $10.00 - $6.89A. $6.25
__2. $15.00 - $13.00B. $5.24
__3. $20.00 - $0.85C. $3.11
__4. $20.00 - $14.76D. $19.15
__5. $40.00 - $38.57E. $1.43
__6. $45.00 - $5.00F. $30.57
__7. $50.00 - $43.75G. $2.00
__8. $100.00 - $45.00H. $55.00
__9. $100.00 - $69.43I. $36.55
__10. $160 - $123.45J. $5.00
参加了这次测试的学生也参加了 :

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