2025年分班考试脱式计算试题及答案

2025年分班考试脱式计算试题及答案一、脱式计算试题（共40题）1.345+278+55+1222.987136643.25×16+75×164.(45018×15)÷305.12.5+3.78+7.51.786.0.25×4.8×47.15.6÷0.25÷48.(3.6×1.5+6.4×1.5)÷59.3/4+5/61/310.2/3×0.6×5/411.7/8÷(1/4+3/8)12.4又1/21又3/4+2又1/313.(2.5×4/51.2)÷(3/4+0.25)14.[1(1/3+1/4)]×2415.125×48×2516.5/6×12/25×15/817.48×1014818.0.9×99+0.919.1/2+1/6+1/12+1/2020.(3/5+1/2)×204/7×1421.2.4×5/61.8÷0.322.720÷16÷523.15×27+15×72+1524.(3/41/2)÷(5/6+1/3)25.[3.6(1/2+0.8×2/5)]÷0.526.1+2+3+…+2027.2/3+2/9+2/27+2/8128.(1/3+1/41/6)×2429.0.125×3.2×2.530.0.75×4/9+1/3×0.7531.10023.526.51832.(12×540)÷(36÷6)33.5/8÷[(1/2+1/3)×3/5]34.25×(40+4)35.15.63.72+4.46.2836.3又1/3×0.6×5/837.[1(3/41/3)]÷(5/6)38.7.8×9.9+0.7839.4/5÷(1/23/8)×2/340.(2.8×3.5+1.2×3.5)÷0.7二、脱式计算答案（逐题解答）1.345+278+55+122=(345+55)+(278+122)=400+400=8002.98713664=987(136+64)=987200=7873.25×16+75×16=(25+75)×16=100×16=16004.(45018×15)÷30=(450270)÷30=180÷30=65.12.5+3.78+7.51.78=(12.5+7.5)+(3.781.78)=20+2=226.0.25×4.8×4=(0.25×4)×4.8=1×4.8=4.87.15.6÷0.25÷4=15.6÷(0.25×4)=15.6÷1=15.68.(3.6×1.5+6.4×1.5)÷5=(3.6+6.4)×1.5÷5=10×1.5÷5=15÷5=39.3/4+5/61/3=9/12+10/124/12=15/12=5/410.2/3×0.6×5/4=2/3×3/5×5/4=(2/3×3/5)×5/4=2/5×5/4=1/211.7/8÷(1/4+3/8)=7/8÷(2/8+3/8)=7/8÷5/8=7/8×8/5=7/512.4又1/21又3/4+2又1/3=9/27/4+7/3=54/1221/12+28/12=61/12=5又1/1213.(2.5×4/51.2)÷(3/4+0.25)=(2.5×0.81.2)÷(0.75+0.25)=(21.2)÷1=0.8÷1=0.814.[1(1/3+1/4)]×24=[17/12]×24=5/12×24=1015.125×48×25=125×(8×6)×25=(125×8)×(6×25)=1000×150=15000016.5/6×12/25×15/8=(5×12×15)/(6×25×8)=(5×2×15)/(1×25×8)（约分：12÷6=2，25÷5=5）=(10×15)/(5×8)=150/40=3/417.48×10148=48×(1011)=48×100=480018.0.9×99+0.9=0.9×(99+1)=0.9×100=9019.1/2+1/6+1/12+1/20=(11/2)+(1/21/3)+(1/31/4)+(1/41/5)=11/5=4/520.(3/5+1/2)×204/7×14=3/5×20+1/2×208=12+108=1421.2.4×5/61.8÷0.3=26=-422.720÷16÷5=720÷(16×5)=720÷80=923.15×27+15×72+15=15×(27+72+1)=15×100=150024.(3/41/2)÷(5/6+1/3)=(3/42/4)÷(5/6+2/6)=1/4÷7/6=1/4×6/7=3/1425.[3.6(1/2+0.8×2/5)]÷0.5=[3.6(0.5+0.32)]÷0.5=[3.60.82]÷0.5=2.78÷0.5=5.5626.1+2+3+…+20=(1+20)×20÷2=21×10=21027.2/3+2/9+2/27+2/81=54/81+18/81+6/81+2/81=80/8128.(1/3+1/41/6)×24=1/3×24+1/4×241/6×24=8+64=1029.0.125×3.2×2.5=0.125×(8×0.4)×25=(0.125×8)×(0.4×2.5)=1×1=130.0.75×4/9+1/3×0.75=0.75×(4/9+3/9)=0.75×7/9=7/1231.10023.526.518=100(23.5+26.5)18=1005018=3232.(12×540)÷(36÷6)=(6040)÷6=20÷6=10/333.5/8÷[(1/2+1/3)×3/5]=5/8÷[5/6×3/5]=5/8÷1/2=5/8×2/1=5/434.25×(40+4)=25×40+25×4=1000+100=110035.15.63.72+4.46.28=(15.6+4.4)(3.72+6.28)=2010=1036.3又1/3×0.6×5/8=10/3×3/5×5/8=(10/3×3/5)×5/8=2×5/8=5/437.[1(3/41/3)]÷(5/6)=[15/12]÷5/6=7/12÷5/6=7/12×6/5=7/1038.7.8×9.9+0.78=7.8×9.9+7.8×0.1