简 便 计 算6.62.5 4.6+5.4 ()2.8+7.2+ +2.25+ + + 0.75+0.375 +(+) 5- 48.3- 4.25+60.6250.5+62.5% 2.5(+)22+2575%-70.75 0.2563.5 2.5-+3.125+ +(-1.8) (111+999) 56(-)49.5-(50-)0.6 + 45(+0.6)89737.5%+1040.375 (5.375) 3.5+1.25+3.8 1. 7199 2. 3755+2996 3. 8439+10014. 446+295 5. 888+999 6. 1125-9967. 299101 8. 563999 9. 21002010. 60.25 11. 72156-5672 12. 253212513. 70999+709 14. 0.2548 15. 2.50.4216. 26.6+2.56 17. 75.399+75.318. 4.63.7+540.37 19. 0.125+8.25+12.5%20. 1161 21. 154.25522. 19.826.573.43 23. 4.6+3+6+5.424. 4+2.25+5+7 25. 9.632.5426. 8.37-3.25-(1.37+1.75)
