三年级数学下册脱式计算题300题

同学们，数学学习就像盖房子，基础打得牢，才能建起高楼大厦。脱式计算，也就是我们常说的“递等式计算”，是小学数学中的重要内容。它不仅能帮助我们清晰地展现每一步的运算过程，更能培养大家认真细致的学习习惯和逻辑思维能力。下面，老师为大家精心准备了300道三年级下册脱式计算题。这些题目涵盖了我们本学期所学的加减乘除混合运算，以及带小括号的运算等知识点。希望同学们能认真对待每一道题，按步骤规范书写，争取全部做对！一、同级运算（只有加减或只有乘除）同级运算，按照从左到右的顺序依次计算。这是最基础的脱式计算，一定要熟练掌握哦！（一）只有加减法1.56+34-202.89-35+463.100-67+284.32+58-455.76-29+316.43+29-387.80-44+268.25+65-709.92-57+2810.51+39-4611.68-23+4512.37+48-5913.100-25-3514.63+27-1815.85-49+2616.42+38-5517.70-36+2918.55+35-4019.90-54+3620.33+57-6221.78-42+3522.29+61-4823.84-38+2524.47+33-5125.95-67+2826.38+52-4727.73-28+3928.59+31-4429.88-53+2730.41+49-3631.66-31+4532.27+63-5833.91-56+2934.35+55-4935.77-39+2836.44+46-5237.83-47+3538.30+60-5539.96-69+2440.49+41-38（二）只有乘除法1.8×3÷62.24÷4×53.9×6÷34.48÷6×25.7×8÷46.36÷9×77.5×9÷38.42÷7×69.6×7÷210.54÷6×411.8×8÷412.63÷7×313.4×9÷614.28÷4×915.9×5÷516.45÷5×817.7×6÷318.32÷8×519.5×8÷220.40÷5×721.6×9÷322.56÷8×623.8×4÷224.35÷5×925.7×7÷726.64÷8×327.9×4÷628.49÷7×529.5×6÷330.30÷6×831.8×6÷432.27÷3×733.6×8÷334.42÷6×835.9×3÷936.54÷9×537.4×8÷438.36÷6×939.7×9÷340.63÷9×4二、两级运算（含有加减乘除）当算式中既有加减法，又有乘除法时，要先算乘除法，后算加减法。这可是脱式计算的重点哦！1.20+5×42.30-6÷23.15+24÷34.40-8×35.7×6+256.50-49÷77.36+42÷78.60-5×99.8×4-2010.28÷4+3011.12+9×312.45-36÷613.5×7+3314.63-7×515.42÷6+2916.70-8×617.9×8-4518.35÷5+4019.18+6×620.54-42÷721.6×9+1222.72-8×823.56÷7+3624.40-5×725.8×5+2726.55-30÷527.27÷3+4428.64-9×429.7×4+3830.60-48÷631.32÷4+5032.81-6×733.9×3+6334.50-21÷335.48÷8+4236.75-8×537.6×6+3438.58-35÷739.49÷7+5340.80-7×741.5×8+4642.66-54÷643.30÷5+6744.90-9×945.8×7+2246.63-40÷547.54÷9+3848.76-6×649.7×5+4550.52-28÷451.36÷4+5952.88-8×353.9×7-2354.44+4×855.69-63÷756.25÷5+6557.8×3+5658.70-3×959.63÷9+4960.51+7×461.85-5×862.4×9+3763.68-27÷364.56÷8+5865.9×2+7266.71-4×467.35÷7+6068.5×6+4969.64-18÷270.40÷8+6371.8×9-3672.57-7×273.6×8+2974.77-54÷975.21÷3+5876.9×6-2077.48+5×578.65-32÷479.42÷7+5380.8×4+44三、含有小括号的混合运算算式里有小括号的，要先算小括号里面的。小括号的作用可大了，它能改变运算顺序哦！1.(15+25)÷82.80-(12+28)3.6×(3+5)4.(42-14)÷75.36+(40÷5)6.9×(63÷9)7.(27+33)÷68.70-(35-25)9.5×(9-4)10.(56÷7)+2911.48÷(12-8)12.60+(3×7)13.(81-72)×614.30÷(2+3)15.49-(18+21)16.(100-64)÷417.8×(45÷5)18.50-(26-17)19.(7+2)×820.63÷(36-29)21.28+(5×7)22.(90-54)÷623.7×(10-6)24.40÷(1+3)25.55+(45÷9)26.(32+16)÷827.81-(4×9)28.6×(7+2)29.(64-40)÷330.35+(28÷4)31.(19+25)÷632.90-(6×7)33.8×(36÷4)34.(50-14)÷635.42+(9×3)36.63÷(12-5)37.(8+16)×238.72-(45÷5)39.5×(28÷4)40.(67-58)×741.36+(63÷7)42.(44-20)÷443.9×(8-5)44.56-(3×8)45.(30+24)÷946.64÷(2×4)47.29+(7×5)48.(80-32)÷849.6×(5+4)50.45-(27÷3)四、综合提升练习下面这些题目会更有挑战性，综合了我们学过的各种运算类型，大家一定要仔细审题，按顺序计算哦！1.36+14÷72.54-9×53.(23+49)÷84.72÷8+355.6×7-286.40-(15+17)7.81÷9×48.25+5×79.60-42÷610.(36-28)×511.7×8+1912.56÷7÷213.90-6×914.48÷(2+4)15.18+7×616.63-35÷517.(52+18)÷718.8×9-4719.30÷5+5320.76-(20-12)21.4×9÷622.33+6×823.70-7×724.54÷(9-3)25.28+36÷426.6×(14÷2)27.85-4×828.49÷7+5629.(31+25)÷630.9×3-1531.50-24÷332.6×8+2233.72÷9+4334.(60-48)×735.17+8×536.66-5×937.35÷5×938.29+(45÷