分数乘除法口算100题

分数乘除法口算100题分数乘除法是小学数学学习中的重要组成部分，熟练掌握其口算技巧，不仅能够提高计算速度和准确性，更是深入理解分数意义、进行更复杂数学运算的基础。为帮助同学们夯实基础，提升口算能力，特整理以下100道分数乘除法口算题。希望同学们能认真对待，独立完成，并进行自查，以此巩固所学知识，为后续学习打下坚实的根基。一、分数乘法口算练习分数乘法的核心在于分子与分子相乘，分母与分母相乘，能约分的要先约分，再进行计算，这样可以简化运算过程。请同学们在练习时，注意观察数字特点，灵活运用约分技巧。（一）分数乘整数1.1/2×4=2.3/5×2=3.2/3×6=4.5/8×4=5.1/4×8=6.3/7×3=7.4/9×3=8.5/6×2=9.7/10×5=10.2/11×3=11.3/8×4=12.5/9×6=13.1/3×7=14.4/5×10=15.6/7×2=16.3/4×8=17.2/5×5=18.5/7×14=19.1/6×9=20.7/8×2=21.3/10×6=22.4/11×5=23.2/7×21=24.5/12×3=25.1/5×15=（二）分数乘分数26.1/2×1/3=27.2/3×3/4=28.3/5×5/6=29.4/7×1/2=30.5/8×2/3=31.1/4×3/5=32.2/5×4/7=33.3/7×7/9=34.5/6×3/10=35.7/12×3/14=36.4/9×3/8=37.1/6×4/5=38.5/11×2/5=39.3/8×4/9=40.2/9×3/4=41.5/7×7/10=42.1/3×3/7=43.4/5×5/8=44.6/13×2/3=45.3/4×8/15=46.7/15×5/21=47.2/11×11/12=48.5/16×4/25=49.3/10×5/6=50.8/9×3/16=二、分数除法口算练习分数除法的计算法则是：除以一个不为零的数，等于乘这个数的倒数。同学们在练习时，要先将除法转化为乘法，再按照分数乘法的法则进行计算。（一）分数除以整数51.1/2÷2=52.3/4÷3=53.5/6÷5=54.7/8÷1=55.2/3÷4=56.4/5÷2=57.6/7÷3=58.8/9÷4=59.3/10÷6=60.5/12÷5=61.7/15÷7=62.1/4÷3=63.2/7÷4=64.4/9÷2=65.5/11÷10=66.3/8÷9=67.6/13÷3=68.8/17÷4=69.9/20÷6=70.7/22÷14=（二）一个数除以分数71.1÷1/2=72.2÷2/3=73.3÷3/4=74.5÷5/6=75.4÷1/4=76.1/2÷1/3=77.3/4÷1/2=78.5/6÷5/12=79.2/3÷4/5=80.7/8÷3/4=81.3/5÷9/10=82.4/7÷2/7=83.1/6÷5/6=84.5/9÷1/3=85.7/10÷7/15=86.3/8÷5/8=87.6/11÷3/22=88.5/14÷10/21=89.8/15÷4/25=90.9/16÷3/4=91.2/5÷6/25=92.7/12÷14/15=93.4/15÷8/27=94.5/21÷10/63=95.11/18÷22/27=96.3/7÷12/35=97.8/21÷4/7=98.5/24÷15/32=99.10/27÷5/9=100.7/30÷14/45=参考答案完成上述练习后，请同学们对照以下答案进行自查。如有错误，请仔细分析原因，及时订正。分数乘法口算答案（一）分数乘整数1.22.6/53.44.5/25.26.9/77.4/38.5/39.7/210.6/1111.3/212.10/313.7/314.815.12/716.617.218.1019.3/220.7/421.9/522.20/1123.624.5/425.3（二）分数乘分数26.1/627.1/228.1/229.2/730.5/1231.3/2032.8/3533.1/334.1/435.1/836.1/637.2/1538.2/1139.1/640.1/641.1/242.1/743.1/244.4/1345.2/546.1/947.1/648.1/2049.1/450.1/6分数除法口算答案（一）分数除以整数51.1/452.1/453.1/654.7/855.1/656.2/557.2/758.2/959.1/2060.1/1261.1/1562.1/1263.1/1464.2/965.1/2266.1/2467.2/1368.2/1769.3/4070.1/44（二）一个数除以分数71.272.373.474.675.1676.3/277.3/278.279.5/680.7/681.2/382.283.1/584.5/385.3/286.3/587.488.3/48