简 便 计 算×6.6＋2.5× －－ 4.6+++5.4 ×(－÷)2.8++7.2+ +2.25++ ++ －++－++ 0.75+++0.375 ＋+++－(+) 5-- 48.3-- ×4.25+÷60.625×0.5++×62.5% ×÷ 2.5×(+++)22×+25×75%-7×0.75 0.25×63.5－× ×2.5-×+3.125++ +(-1.8) (111+999) ÷[56×(-)]49.5×-(50-)×0.6 ×+÷+ 45×(+－0.6)897×－37.5%+104×0.375 ×(－5.375) 3.5×+1.25×+3.8÷ 1. 71×99 2. 3755+2996 3. 8439+10014. 446+295 5. 888+999 6. 1125-9967. 299×101 8. 563×999 9. 2100÷2010. 6÷0.25 11. 72×156-56×72 12. 25×32×12513. 709×99+709 14. 0.25×48 15. 2.5×0.4×216. 2×6.6+2.5×6 17. 75.3×99+75.318. 4.6×3.7+54×0.37 19. 0.125×+×8.25+12.5%20. 11―6―1 21. 15―4.25―522. 19.82―6.57―3.43 23. 4.6+3+6+5.424. 4+2.25+5+7 25. 9.63÷2.5÷426. 8.37-3.25-(1.37+1.75)
