用简便方法计算

用简便方法计算。 1、368+2649+1351 2、89+101+111 3、24+127+476+573 4、400-273-127 5、327+(96-127) 6、72×98 7、442-103-142 8、999+99+9 9、67×5×2 10、25×(78×4) 11、72×125 12、9000÷125÷8 13、400÷25 14、25×36 15、103×27 16、76×102 17、3600÷25÷4 18、99×35 19、(25+12)×4 20、56×27+27×44 21、56×99+56 22、125×25×8×4 23、25×32×125 24、125×64 简便计算: 1.56×1.7+0.44×1.7-0.7 11.72-7.85-(1.26+0.46) 10.64+7.65×2.4+11.76 12.9÷〔14.66-(1.3+8.2)〕 9.83×(3.8-2.3)+1.5×6.17 6.752-〔4.7×(0.54-0.38)+2.8〕15.4÷〔8×(6.34-4.59)〕 7000÷125=(7000×8)÷(125×8) 6400÷800=(6400÷100)÷(800÷100) 125×93×8 8×(500+125) 47×163+37×47 4000÷125 650÷25+26×99 17×101+83 17×99-83 125×8.8 1.3+4.25+3.7+3.75 17.15-(3.5-2.85) 3.4×99+3.4 4.8×1.01 0.4×(2.5÷73) 12.3-2.45-5.7-4.55 2 +0.125×0.25×64 64.2×87+0.642×1300 78×36+7.8×741-7 17+8 0.125×+0.5 42 +4.58 -43 25÷100 25-3 -(2 -1 ) 72×156-56×72 25×32×125 709×99+709 0.25×48 2.5×0.4×2 2×6.6+2.5×6 75.3×99+75.3 4.6×3.7+54×0.37 0.125×+×8.25+12.5% 11―6―1 15―4.25―5 19.82―6.57―3.43 4.6+3+6+5.4 4+2.25+5+7 9.63÷2.5÷4 8.37-3.25-(1.37+1.75) 乘法: 5.6×2.9 3.77×1.8 0.02×96 5.22×0.3 9.99×0.02 4.67×0.9 5×2.44 1.666×6.1 9.432×0.002 5.6×6.5 4.88×2.9 5.61×4.3 8.9×2.4 5.5×55 9.77×0.02 1.384×5.1 8.78×83 2.6×61 0.059×0.2 4.268×1.7 57×5.7 9.46×2.85 17.8×6.4 1.5×4.9 2.5×0.88 5.555×5.2 2.22× 3.33 7.658×85 36.02×0.3 56.78×8 除法: 85.44÷16 42.84÷7 101.7÷9 67.5÷15 230.4÷6 21.24÷36 0.736÷23 43.5÷12 35.21÷7 39.6÷24 6.21÷0.03 210÷1.4 51.3÷0.27 91.2÷3.8 0.756÷0.18 0.66÷0.3 11.97÷1.5 69.6÷2.9 38.4÷0.8 15÷0.06 (循环小数的用简便方法,除不尽保留2位小数): 8.2÷0.12 0.8÷0.9 76.4÷5.4 4.7÷3 1.25÷1.2 32÷42 14.36÷2.7 8.33÷6.2 1.7÷0.03 2.41÷0.7 用竖式计算 0.396÷1.2= 0.756÷0.36= 15.6×13= 0.18×15= 0.025×14= 3.06×36= 0.04×0.12= 3.84×2.6≈ 5.76×3=(保留一位小数) 7.15×22 90.75÷3.3 3.68×0.25 16.9÷0.13 1.55÷3.9 3.7×0.016 13.76×0.8= 5.2×0.6 8.4×1.3 6.4×0.5 4.48×0.4 5.25×5 35.4×4.2 0.042×0.54 0.76×0.32 0.25×0.046 2.52×3.4 1.08×25 0.12×0.5×0.16= 4.8×0.25=0.125×1.4≈(保留两位小数) 2.5÷0.7= (保留三位小数)10.1÷3.3= (商用循环小数) 10.75÷12.5= (用乘法验算) 3.25×9.04= (用除法验算) 3、脱式计算(能简算的要简算) 2.5×7.1×4 16.12×99+16.12 5.2×0.9+0.9 7.28×99+7.28 4.3×50×0.2 64-2.64×0.5 26×15.7+15.7×24 (2.275 +0.625)×0.28 3.94+3 4.3×0.2 1.2×(9.6÷2.4)÷4.8 8.9×1.1×4.7 2.7×5.4×3.9 3.6×9.85-5.46 8.05×3.4+7.6 6.58×4.5×0.9 2.8×0.5+1.58 32+4.9-0.9 4.8-4.8×0.5 (1.25-0.125)×8 4.8×100.1 56.5×99+56.5 7.09×10.8-0.8×7.09 4.85 + 0.35 ÷ 1.4 8.7 × 17.4 - 8.7 × 7.4 12.5×0.4×2.5×8 0.87×3.16+4.64 9.5×101 0.68 ÷(5.2 -3.5)× 1.25 40.5 ÷ 0.81 × 0.18 4.8 ×(15 ÷ 2.4) 6.81+6.81×99 0.25×185×40 4.4×0.8-3.4×0.8 (9.37+9.37+9.37+9.37)× 2.5 2.37×6.3+2.37× 3.7 2.5×1.25×0.32 3.8×10.1 2.5×( 3.8×0.04) 7.69×101 3.8×10.2 0.25×39+0.25 0.125×72 46×0.33+54×0.33 (8×5.27) ×1.25 6.81+6.81×99 0.25×185×40 6.8×0.75÷0.5 3.75÷0.125–2.75 1.53+23.4÷7.2 9.5×99 13.5×0.98 12.5×8.8 二、解方程: 54-X=24 7X=49 126÷X=42 13+A=28.5 2.4X=26.4 7.5x-3x=18 5×1.3-2x=5.5 24x+6x=63.6 5.6x+4.4x=5.2 x+3.86=5.46 17.89-x=12.89 40.8+x=57.3 x-3.25=16 2x+0.82=8.2 3+0.5x=7 7.8÷x=2.6 80x÷4=12 5-0.9x=2.75 2x+0.4x=48 6-2x+6x=18 35x+13x=9.6 0.52×5-4x=0.6 0.7(x+0.9)=42 1.3x+2.4×3=12.4 3.5x = 140 2x +5 = 40 15x+6x = 168 5x+1.5 = 4.5 13.7—x = 5.29 4.2 × 3—3x = 5.1 (写出检验过程) 20.5-4x=8.1 3.6x÷1.2=9.75 18×1.5-1.7x=13.4 18.5x-9.9x=1.721 9.2x+1.5x=32.1 7.2×5-8x=11.2 4x+3×0.7=6.5 (口算) 0.6×1.2= 0.84÷0.6= 4.5×0.1= 15×0.4= 0.1×0.5= 2.8÷7= 100÷0.01= 1.4×3= 0.72÷8= 6÷0.03= 0.5×0.6= 40×0.9= 4÷0.5= 7×2.1= 8.89+0.1= 24×0.25= 0.1÷0.01= 2.4×0.8= 9×0.4= 10×0.01= 30.2-3.02= 4.3-0.25= 1-0.82= 9.6÷0.3= 2.6×0.01= 0×25.4= 4.8×0.4= 7.2+2.8= 12×2.5= 2.63+0.37= 0.7×16-16×0.2= 0.96÷0.3= 1.5-4.5= 2.5×0.4 1.4×2.5×4=8-2.5= 6÷1.2= 9.2÷2.3= 24÷4+56÷4= 0.36+0.64=4÷0.25= 1.8×5= 30×(200+3)=8.4÷4.2= 8×1.5= 4.8÷0.3= 2.73+1.5×4= 计算下面各题(能简算的要简算) 7.05×23.7+7.05×76.3 0.125×3.2×2.5 12.81-(1.5+7.81) 8.7×2.6+6.4×8.7+8.7 1025-1125÷4.5×3.6 12.25-3.1+0.85-6.17 (1.9-1.9×0.9)÷(3.8-2.8) 2.65×1.7+1.35×1.7 列竖式计算,得数保留一位小数。 1.2×1.4=0.37×8.4= 3.14× 2.8= 0.85×1.12=0.86×5.4=0.15×2.34= 40÷14=26.37÷31=45.5÷38= 1560÷35= 4.8÷2.3= 1.55÷ 3.9= 7.2÷2.1= 3.87÷7=146.4÷13= 5.63÷6.1= 2.84×0.03=0.38×0.13= 26.37÷31=32÷42= 2.84×0.03= 4.8÷23=0.382×0.13= 4.2÷4.5= 列竖式计算 1.64+ 2.35= 8.65-6.31= 28.448÷14= 0.58×250= 12.5+3.6= 10.88÷34= 10-7.64= 1.86×7= 13.88-6.29= 926×0.15= 8÷500= 26.3+7.93= 23×7.06= 100.2-2.28= 44÷9(精确到百分位) 三、计算(能简便的用简便方法计算) 8×25×1.25×16 4.04×250 45.55-(6.82+15.55)3.2×99+3.2 4.8×39+61×4.8 34.52-17.87-12.23 2.5×56+4.5×65 489×101-489 4.57+3.17+3.43+5.83 4.6×56+48×4.6-4.6×4 竖式计算: 18÷24= 43.68÷26= 25.3÷0.88= 0.1575÷3.15= 0.612÷1.8= 16.787÷0.28 1、算下面各题 2.36×0.22 2.8×4.58 3.57÷ 4.2 82.8÷36 45×2.46 3.6÷0.24 382.5÷45 6.4× 5.48 2、简便计算 3.6×2.5+7.5×3.6 2.5×1.2 0.125×32 4.3×0.9 6.5×102 3.25×99+3.25 18÷24= 43.68÷26= 25.3÷0.88= 0.1575÷3.15= 0.612÷1.8= 16.787÷0.28