小学数学解方程专题

解方程专题姓名：家长签字：求加数或求因数的方程7+x=19x+120=17658+x=90x+150=29079.4+x=95.52x+55=1297x=63x×9=4.54.4x=444x×4.5=90x×5=1006.2x=124二、求被减数或求被除数的方程x－6=19x－3.3=8.9x－25.8=95.4x－54.3=100x－77=275x－77=144x÷7=9x÷4.4=10x÷78=10.5x÷2.5=100x÷3=33.3x÷2.2=8带括号的方程（先将小括号内的式子看作一种整体来计算，然后再来求方程的解）3×(x－4)=46(８+x)÷5=15含有两个未知数的，我们能够用乘法分派律来解答，求出方程的解。12x+8x=4012x－8x=4012x＋x=26x+0.5x=6x－0.2x=321.3x+x=26求减数或除数的方程9－x=4.573.2－x=52.587－x=2266－x=32.377－x=21.999－x=61.93.3÷x=0.38.8÷x=4.49÷x=0.037÷x=0.00156÷x=539÷x=3综合练习：3X+5X=4814X-8X=1220X-50=5028+6X=8832-22X=1024-3X=399X=100-XX+3=18X-6=1256-2X=204y+2=6x+32=763x+6=1816+8x=402x-8=84x-3×9=298x-3x=105x-6×5=42x+5=72x+3=1012x-9x=96x+18=4856x-50x=305x=1578-5x=2832y-29=35x+5=1589x-9=80100-20x=2055x-25x=6076y-75=123y-23=234x-20=080y+20=10053x-90=162x+9x=1112y-12=2480+5x=1007x-8=690y-90=9065x+35=10019y+y=4025-5x=1579y+y=8042x+28x=1403x-1=880y-90=7078y+2y=16088-x=809-4x=120x=4065y-30=10051y-y=10085y+1=8645x-50=40(0.5+x)+x=9.8÷22(X+X+0.5)=9.825000+x=6x3200=450+5X+XX-0.8X=612x-8x=4.87.5×2X=151.2x=81.6x+5.6=9.4x-0.7x=3.691÷x＝1.3X+8.3=10.715x＝33x－8＝160.1(x+6)=3.3×0.47(x-2)=2x+33x+9=2718(x-2)=27012x=300-4x7x+5.3=7.43x÷5=4.830÷x+25=851.4×8-2x=66x-12.8×3=0.06410-3x=1703(x+0.5)=21(x-140)÷70=40.5x+8=436x-3x=181.5x+18=3x5×3-x÷2=80.273÷x=0.351.8x=0.972x÷0.756=909x-40=5x÷5+9=21(200-x)÷5=3048-27+5x=3110.5+x+21=56x+2x+18=784(x-5.6)=1.67(6.5+x)=87.5(27.5-3.5)÷x=4X-7.7=2.855X-3X=684X+10=5320=45+6XX-0.6X=8x+8.6=9.452－2x＝1513÷x＝1.3X+8.3=19.715x＝303x+9＝367(x-2)=73x+9=1218(x-2)=2712x=320+4x5.37+x=7.4715÷3x=530÷x=851.8+2x=6420-3x=1703(x+5)=180.5x+9=406x+3x=361.5x+6=3x5×3-x=840-8x=5x÷5=2148-20+5x=31x+2x+8=80200-x÷5=3070÷x=445.6-3x=1.69.8-2x=3.85(x+5)=100x+3x=703(x+3)=502x＋0.4x=488x－x=14.735x＋13x=9.65(x＋3)=35x＋3.7x＋2=16.114x＋3x－1.2x=1580.52×5－4x=0.60.7(x＋0.9)=421.3x＋2.4×3=12.4x＋(3－0.5)=127.4－(x－2.1)=67x－27=13－3x5x＋34=3x＋545x＋2x=1.4＋0.076x－3x=6÷5x－13.4＋5.2=1.570.4×25－3.5x=6.57x＋3×1.4x=0.2×565×(3－2x)=2.4×56×(3－2x)=1.2×53（x－0.2）=9.610x＋45×8=810x－0.35x=0.910.3÷0.15＋25x=127.5x＋x=10.2(1.5＋x)×2=915x－5x＋16=8015.6÷4－3.5x=1.15x－4×12=22.514x÷3=6.3×44（4x－1）=3（22－x）5（x-8）=3x7x-7=6x+47（2x-6）=848x-15×