资源简介 中小学教育资源及组卷应用平台解方程(专项训练)数学五年级上册人教版1.解方程.(1)2x-8=10(2)5x-3×4=242.解方程。(1)x÷12.5=8(2)3(x-5.5)=62.1(3)0.5x+1.45=10.43.解方程。(1)12.5÷x=2.5(2)6x-12.8×3=0.064.解方程(带☆的要检验)(1)x-6=6.6(2)2x+1.5x=17.5(3)☆(1.2+x)÷2=2.75.解方程。(1)(2)2.3(x-2.5)=2.766.解方程。(1)15x+9.8=34.7(2)12x-9x=8.7(3)x÷8=0.4(4)2(x-3)=1067.解方程。(1)x+11.06=25.2(2)0.8x-0.6x=0.44(3)0.8x-0.6=0.448.解方程。(1)3.2x-38.2=25.8(2)0.6×5+x=46.8(3)2(x-1.7)=10.89.解方程。(1)2.1+4x=8.5(2)2x-4×5.5=7.6(3)7x+10x=10.210.解方程。(1)x-117=139(2)5x-7=28(3)6.6x-5.4x=1.08(4)6.8+3.2x=14.811.解方程。(1)52-x=15(2)1.5x+0.5×6=4.5(3)8x-5x=2712.解方程。(1)2x+6.6=8.4(2)3x- 4×6.5=7.6(3)5.1 ÷x= 0.85×2(4)3(x-2.1)=8.413.解方程。(1)5(x+1.5)=17.5(2)x-0.36x=1614.解方程。(1)3.6x-x=3.12(2)12×8-8x=16(3)2.8x+4=4.7(4)3.5(x-2.4)=12.615.解方程。16.解下列方程。(1)7(x-1.2)=2.1(2)1.8x+0.9x=13.517.解方程。(1)0.8x+7.2x=5.6(2)1.7x+6×3=26.5(3)0.6(5.3-x)=2.418.解方程。(1)x÷8.2=0.5(2)2x+4.5x=26(3)(6x-2.4)×6=7.219.解方程。(1)3.2+x=9.6(2)8(x-6.2)=41.6(3)12x-9x=8.720.解方程。(1)x-5.7=43.6(2)18+5x=21答案解析部分1.【答案】(1) 2x-8=10解:2x-8+8=10+82x=182x÷2=18÷2x=9(2) 5x-3×4=24解:5x-12=245x-12+12=24+125x=365x÷5=36÷5x=7.22.【答案】(1)x÷12.5=8解:x=8×12.5x=100(2)3(x-5.5)=62.1解:x-5.5=62.1÷3x-5.5=20.7x=20.7+5.5x=26.2(3)0.5x+1.45=10.4解:0.5x=10.4-1.450.5x=8.95x=8.95÷0.5x=17.93.【答案】(1)12.5÷x=2.5解:x=12.5÷2.5x=5(2) 6x-12.8×3=0.06解:6x-38.4=0.066x-38.4+38.4=0.06+38.46x=38.466x÷6=38.46÷6x=6.414.【答案】(1) x-6=6.6解:x-6+6=6.6+6x=12.6(2) 2x+1.5x=17.5解:3.5x=17.53.5x÷3.5=17.5÷3.5x=5(3) (1.2+x)÷2=2.7解:(1.2+x)÷2×2=2.7×21.2+x=5.41.2+x-1.2=5.4-1.2x=4.2检验:把x=4.2代入方程左边=(1.2+4.2)÷2=5.4÷2=2.7=方程的右边所以,x=4.2是方程的解。5.【答案】(1) 7x+4=21.5解:7x=17.57x÷7=17.5÷7x=2.5(2)2.3(x-2.5)=2.76解:x-2.5=1.2x-2.5+2.5=1.2+2.5x=3.76.【答案】(1)15x+9.8=34.7解:15x=34.7-9.815x=24.9x=1.66(2)12x-9x=8.7解:3x=8.7x=2.9(3) x÷8=0.4解:x=0.4×8x=3.2(4)2(x-3)=106解:x-3=53x=567.【答案】(1)x+11.06=25.2解:x=25.2-11.06x=14.14(2)0.8x-0.6x=0.44解:0.2x=0.44x=0.44÷0.2x=2.2(3) 0.8x-0.6=0.44解:0.8x=0.44+0.60.8x=1.04x=1.04÷0.8x=1.38.【答案】(1) 3.2x-38.2=25.8解:3.2x-38.2+38.2=25.8+38.23.2x=643.2x÷3.2=64÷3.2x=20(2)0.6×5+x=46.8解:3+x=46.83+x-3=46.8-3x=43.8(3) 2(x-1.7)=10.8解:2(x-1.7)÷2=10.8÷2x-1.7=5.4x-1.7+1.7=5.4+1.7x=7.19.【答案】(1) 2.1+4x=8.5解:2.1+4x-2.1=8.5-2.14x=6.44x÷4=6.4÷4x=1.6(2) 2x-4×5.5=7.6解:2x-22=7.62x-22+22=7.6+222x=29.62x÷2=29.6÷2x=14.8(3) 7x+10x=10.2解:17x=10.217x÷17=10.2÷17x=0.610.【答案】(1) x-117=139解: x-117+117=139+117x=256(2) 5x-7=28解: 5x-7+7=28+75x=355x÷5=35÷5x=7(3)6.6x-5.4x=1.08解:1.2x=1.081.2x÷1.2=1.08÷1.2x=0.9(4) 6.8+3.2x=14.8解: 6.8+3.2x-6.8=14.8-6.83.2x=83.2x÷3.2=8÷3.2x=2.511.【答案】(1) 52-x=15解:52-x+x=15+x15+x-15=52-15x=37(2)1.5x+0.5×6=4.5解:1.5x+3=4.51.5x=4.5-3x=1.5÷1.5x=1(3) 8x-5x=27解:3x=27x=27÷3x=912.【答案】(1)2x+6.6=8.4解:2x=8.4 -6.62x=1.8x=1.8÷2x=0.9(2) 3x- 4×6.5=7.6解:3x-26=7.63x=7.6+263x=33.6x=33.6÷3x=11.2(3) 5.1 ÷x=0.85×2解:5.1 ÷x=1.7x=5.1÷1.7x=3(4)3(x-2.1)=8.4解:x-2.1=8.4÷3x-2.1=2.8x=2.8+2.1x=4.913.【答案】(1) 5(x+1.5)=17.5解:5(x+15)÷5=175÷5x+1.5=3.5x+1.5-1.5=3.5-1.5x=2(2) x-0.36x=16解:0.64x=160.64x÷0.64=16÷0.64x=2514.【答案】(1) 3.6x-x=3.12解:2.6x=3.12x=3.12÷2.6x=1.2(2) 12×8-8x=16解:96-8x=168x=96-16x=80÷8x=10(3) 2.8x+4=4.7解:2.8x=4.7-4x=0.7÷2.8x=0.25(4)3.5(x-2.4)=12.6解:x-2.4=12.6÷3.5x=3.6+2.4x=615.【答案】解:16.【答案】(1)7(x-1.2)=2.1解:x-1.2=2.1÷7x=0.3+1.2x=1.5(2)1.8x+0.9x=13.5解:2.7x=13.5x=13.5÷2.7x=517.【答案】(1)0.8x+7.2x=5.6解:8x=5.68x÷8=5.6÷8x=0.7(2) 1.7x+6×3=26.5解:1.7x+18=26.51.7x+18-18=26.5-181.7x=8.51.7x÷1.7=8.5÷1.7x=5(3) 0.6(5.3-x)=2.4解: 0.6(5.3-x)÷0.6=2.4÷0.65.3-x=4x=5.3-4x=1.318.【答案】(1) x÷8.2=0.5解:x÷8.2×8.2=0.5×8.2x=4.1(2) 2x+4.5x=26解:6.5x=266.5x÷6.5=26÷6.5x=4(3) (6x-2.4)×6=7.2解:(6x-2.4)×6÷6=7.2÷66x-2.4=1.26x-2.4+2.4=1.2+2.46x=3.66x÷6=3.6÷6x=0.619.【答案】(1) 3.2+x=9.6解:3.2+x-3.2=9.6-3.2x=6.4(2) 8(x-6.2)=41.6解:8(x-6.2)÷8=41.6÷8x-6.2=5.2x-6.2+6.2=5.2+6.2x=11.4(3)12x-9x=8.7解:3x=8.73x÷3=8.7÷3x=2.920.【答案】(1)x-5.7=43.6解:x=43.6+5.7x=49.3(2)18+5x=21解:5x=21-185x=3x=3÷5x=0.621世纪教育网 www.21cnjy.com 精品试卷·第 2 页 (共 2 页)21世纪教育网(www.21cnjy.com) 展开更多...... 收起↑ 资源预览