2 －(12 2 5 －3－435 6 5 1 0.75+8 +4 +0.375 12 5 7 +2 5 ) 17.15－ 8.47－ 1.53 17 6 4 5 －(2 － 1 4.25 －3 6 6 4 ) 1 3 4 4 4 4 4 5 ＋ 95 +995 +9995 +99995 25×（ 37×8） 25× 32× 125 1 400÷ 125÷ 8 5 ×3 125× 8.8 0.125× 0.25× 32 25× 3 ÷ 2 10 3 5 3 1 3 11 ＋ 7 12 5 7 4 318 × 7213 ÷ 318 34 × (58 － 5.375)( 18 + 24 )× 72 45× (9 +15 － 0.6) 2 187.7× 11－ 187.7 3 ＋ 11 )× 15× 11 5 1 0.625× 0.5+8 +2 × 62.5% 3.4×99＋ 3.4 (15 ? 7 ＋ ÷2 1 5 5 2 × 43 7 1 ＋ 57.125 × － 0.5 × 1 2 2.42 ÷3 4 +4.58 ×－4÷ 3 1 1 3 9 11 9 8 2 3 1 1 7 1 7 7 ÷ 11 2 × 5 22× 4 +25× 75%-7× 0.75 0.25× 63.5－ 4 × 132 615 ×2.5 —22 ×415 + 9 5 9 11 7 14 5 4 7 3 1 7 +1.25 × 24 11 × 419 +519 ÷ 17 +11 897× 8 － 37.5%+104× 0.375 3.5× 1 410 +3.8÷ 5 0.125×3 1 + × 8.25+12.5% 18×9＋ 7×9＋9 1 ×58＋ 1 ×41＋ 1 4 8 25 16 25 16 16 8 8 8 3 x + 1 x =2.25 2x - 1.6=5.4 20%x + 3 =4 1 x + 2 x 4 2 4 5 3 =26 20 - 15% x = 5 3 x ÷ 1 =18 3 - 2x = 3 x - 75%x = 5 4 6 5 2 本文来源：https://www.wddqw.com/doc/3bd02dccdfccda38376baf1ffc4ffe473268fdce.html