1、2021-2022学年五年级数学下册典型例题系列之第一单元:解方程专项练习1解下列方程。 2解方程。8x440 7(x10)1403解方程。5x20.833.4 2(x2.4)8.44解方程。 5解方程。 6解方程。15x240 3.5xx18 1.6x2.75.37解方程。 8解方程。1.6x33.2 0.75x0.5x1 70x61.26.89解方程。 10解方程。4x32.4 5.4x4.6x7.2 1823x6011解方程。 12解方程。 3.6x22.16 8x1.5x13 2.5x0.58613解方程。2(x2.5)8 7x5x106 3.2x1849.214解方程。2x2.55.
2、4 6x1.5717.7 7(x5.4)22.415解方程。5.6x10 5x1.3 x0.0825 2x0.426.916求未知数x。 76x91 x24.8 0.1x2744 4.5x0.5x617解方程x0.260.52 9x2x21.73.1822x4.26 0.25x3.751218解方程。3.563x11.4 4(x3)23.2560.4.x20 4x11.219.3219解方程。 20解方程。15x4x=13.2 8x0.825.615x518 x2.60.4521解方程。7x1.23.7 x2.753.86 x0.8x3.61.5x0.634.8 x6x65.1 4.84x40
3、参考答案1【解析】 解:5x3.5x0.7解:21x10.88.121x18.9x0.92【解析】8x4408x444048x368x8368x4.57(x10)1407(x10)71407x1020x10102010x303【解析】5x20.833.4解:5x33.41.6x355x72(x2.4)8.4解:x2.48.42x4.22.4x1.84【解析】 解: 解:解:5【解析】 解: 解:解:6【解析】15x240解:x24015x163.5xx18解:(3.51)x18x184.5x41.6x2.75.3解:1.6x5.32.7x81.6x57【解析】0.95x0.83解:x0.950
4、.83x0.123.6x22.16解:3.6x2.1623.6x4.32x4.323.6x1.20.5x1.8418.8解:0.5x7.218.80.5x18.87.20.5x26x260.5x528【解析】1.6x33.2解:1.6x3.231.6x9.6x9.61.6x60.75x0.5x1解:0.25x1x10.25x470x61.26.8解:70x7.26.870x6.87.270x14x1470x0.29【解析】解:解:解:10【解析】4x32.4解:4x2.434x7.2x7.24x1.85.4x4.6x7.2解:0.8x7.2x7.20.8x91823x60解:363x603x6
5、0363x24x243x811【解析】解:x94.65x4.35;解:2.4x13.61.62.4x12x5;解:x3.50.8x2.812【解析】(1)3.6x22.16 解:3.6x222.1623.6x4.323.6x3.64.323.6x1.2(2)8x1.5x13 解:6.5x136.5x6.5136.5x2(3)2.5x0.586解:2.5x462.5x102.5x2.5102.5x413【解析】2(x2.5)8解:2x582x13x6.57x5x106解:2x106x533.2x1849.2解:3.2x67.2x2114【解析】2x2.55.4 解:2x2.9x1.45 6x1.
6、5717.7 解:6x10.517.76x7.2x1.2 7(x5.4)22.4解:x5.43.2x8.615【解析】5.6x10解:5.6x5.6105.6x4.45x1.3解:5x51.35x0.26x0.0825解:x0.080.08250.08x22x0.426.9解:2x0.420.426.90.422x7.322x27.322x3.6616【解析】(1)76x91解:x9176x15(2)x24.8 解:x4.82x9.6(3)0.1x2744解:0.1x44140.1x30x300.1x300(4)4.5x0.5x6解:4x6x64x1.517【解析】(1)x0.260.52解:
7、x0.520.26x0.1352(2)9x2x21.7解:7x21.7x21.77x3.1(3)3.1822x4.26解:6.362x4.262x6.364.262x2.1x2.12x1.05(4)0.25x3.7512解:0.25x123.750.25x8.25x8.250.25x3318【解析】3.563x11.4解:213x11.43x2111.43x9.6x3.24(x3)23.2解:x35.8x8.8560.4.x20 解:0.4x56200.4x36x904x11.219.32解:4x19.3211.24x8.12x2.0319【解析】解:24x12x0.5;解:4.50.3x90
8、.3x4.5x15;解:6x11.218.26x29.4x4.9;解:1.4x28x2020【解析】15x4x13.2 解:11x13.2 11x1113.211 x1.28x0.825.6解:8x1.61.65.61.68x7.28x87.28x0.915x518 解:3x3183 x6 x2.60.45解:x2.60.42.60.452.60.4x7.60.4x7.221【解析】7x1.23.7解:7x3.71.2x4.97x0.7x2.753.86解:x3.862.75x1.11x0.8x3.6解:1.8x3.6x3.61.8x21.5x0.634.8解:1.5x4.81.8x31.5x2x6x65.1解:7x65.1x65.17x9.34.84x40解:4x404.8x35.24x8.8