第一题:1/4×(48.5÷5/18-3.6+6.15×3.6)第二题:12.5×(36-7.2)÷3.6第三题:0.36×0.0056/0.05×0.08×0.06第四题:5/9×79又16/17+50×1/9+1/9×5/17第五题:20.3×(2-3/4)+56×1又1/4+(1+25%)×31.7第六题:141
来源:学生作业帮助网 编辑:六六作业网 时间:2025/01/09 07:26:46
第一题:1/4×(48.5÷5/18-3.6+6.15×3.6)第二题:12.5×(36-7.2)÷3.6第三题:0.36×0.0056/0.05×0.08×0.06第四题:5/9×79又16/17+50×1/9+1/9×5/17第五题:20.3×(2-3/4)+56×1又1/4+(1+25%)×31.7第六题:141
第一题:1/4×(48.5÷5/18-3.6+6.15×3.6)
第二题:12.5×(36-7.2)÷3.6
第三题:0.36×0.0056/0.05×0.08×0.06
第四题:5/9×79又16/17+50×1/9+1/9×5/17
第五题:20.3×(2-3/4)+56×1又1/4+(1+25%)×31.7
第六题:141×137/138-137×3/138
第七题:(4/9+1又5/7+6/11)÷(3/11+6/7+2/9)
第八题:41又1/3×3/4+51又1/4×4/5
第一题:1/4×(48.5÷5/18-3.6+6.15×3.6)第二题:12.5×(36-7.2)÷3.6第三题:0.36×0.0056/0.05×0.08×0.06第四题:5/9×79又16/17+50×1/9+1/9×5/17第五题:20.3×(2-3/4)+56×1又1/4+(1+25%)×31.7第六题:141
第一题:1/4×(48.5÷5/18-3.6+6.15×3.6)
=1/4×((48×2+1)/10/18+(5×20+3)/20×(3×5+3)/5)
=1/4×(96/10/18+1/10/18+(5×20+3)18/100)
=1/4×(8/15+1/180+18+27/50)
=2/15+1/720+9/2+27/200
=17171/3600
第二题:12.5×(36-7.2)÷3.6
=12.5×(36÷3.6-7.2÷3.6)
=12.5×(10-2)
=12.5×10-12.5×2
=125-25
=100
第三题:0.36×0.0056/0.05×0.08×0.06
=0.000193536
第四题:5/9×79又16/17+50×1/9+1/9×5/17
=(5×(79×17+16))/9/17+50×17/9/17+5/9/17
=(5×79×17+5×16+50×17+5)/9/17
=(5×79×17+5×17+50×17)/9/17
=(79+1+10)×5×17/9/17
=90×5/9
=10×5
=50
第五题:20.3×(2-3/4)+56×1又1/4+(1+25%)×31.7
=20.3×5/4+56×5/4+5/4×31.7
=(20.3+31.7+56)×5/4
=(52+56)×5/4
=100×5/4+8/4×5
=125+10
=135
第六题:141×137/138-137×3/138
=(141-3)×137/138
=138×137/138
=1×137
=137
第七题:(4/9+1又5/7+6/11)÷(3/11+6/7+2/9)
=((4×4×11+12×9×11+6×9×7)/9/7/11)÷((3×7×9+6×11×9+2×11×7)/11/7/9)
=2×(2×4×11+6×9×11+3×9×7)÷(3×7×9+6×11×9+2×11×7)
=2
第八题:41又1/3×3/4+51又1/4×4/5
=(41×3+1)/3×3/4+(51×4+1)/4×4/5
=(40×3+1×3+1)/4+(50×4+1×4+1)/5
=(40×3+4)/4+(50×4+5)/5
=40×4/4+50×5/5
=40+50
=90