小学六年级上册数学解方程训练(10页).doc

-小学六年级上册数学解方程训练-第 10 页小学六年级上册数学解方程训练解方程的依据：加减乘除法的变形 (1) 加法：a + b = 和 则 a = 和b b = 和a 例：4+5=9 则有：4=9-5 5=9-4 (2) 减法：被减数a 减数b = 差 则：被减数a = 差减数b 被减数a差 = 减数b例：12-4=8则有：12=8+4 12-8=4 (3) 乘法：乘数a × 乘数b = 积 则： 乘数a = 积 ÷ 乘数b 乘数b= 积 ÷ 乘数a例：3×7=21则有：3=21÷7 7=21÷3(4) 除法：被除数a ÷ 除数b = 商 则：被除数a= 商 × 除数b 除数b=被除数a ÷ 商例：63÷7=9 则有：63=9×7 7=63÷9× X-2/7X=3/4 70%X + 20%X = 3.6 25% + 10X =4/512 = ×（+）=X - 15%X = 68 X+3/8 X=121 5X-3×5/21 =5/115X3×= X= 8x×3（x6）×25 6X5 =13.4 3X=6X+5 =13.4 X÷(6/35) =(26/45) ×(13/25) 2(x-0.6)=4(0.5+x)+x=9.8÷2 2(X+X+0.5)=9.8 25000+x=6xX X= 2X + = X×=20×3200=450+5X+X X-0.8X=6 12x-8x=4.8XX121 5X3× X÷127.5*2X=15 1.2x=81.6 x+5.6=9.4X÷= XX= 4X6×=252-x =15 91÷x =1.3 X+8.3=10.7÷X= X = X = ×15x =3 3x-8=16 7(x-2)=2x+3X÷ =× 4x3 ×9 = 29 x + x = 43x+9=2718(x-2)=270 12x=300-4x 7x+5.3=7.43x÷5=4.8 30÷x+25=85 1.4×8-2x=6X21×=4 X+X=18 X×( + )= 6x-12.8×3=0.06 410-3x=170 3(x+0.5)=210.5x+8=43 6x-3x=18 (200-x)÷5=30(x-140)÷70=4 0.1(x+6)=3.3×0.4 4(x-5.6)=1.67(6.5+x)=87.5 (27.5-3.5)÷x=4 3X-(1/2+1/4)=7/12 6.6-5X=3/4-4X 1.1X+2.2=5.5-3.3X (0.5+x)+x=9.8÷2 2(X+X+0.5)=9.8 25000+x=6x 3200=450+5X+X X-0.8X=6 12x-8x=4.8 7.5*2X=15 1.2x=81.6 x+5.6=9.4 52x 15 91÷x 1.3 30x12x14x=1 x-0.7x=3.66X5 =13.4 X-X= 4638X-5.7=2.15 15 5X-2X=18 3X 0.7=5 3.5×2= 4.2 x 26×1.5= 2x 0.5×1616×0.2=4x 9.25X=0.403 16.9÷X=0.3 X÷0.5=2.6 35x80 1.8-6x54 6.7x60.36.7 9 4x40 0.2x0.40.53.7 9.4x0.4x16.2 124x20 1/3x5/6x1.4 12x34x=1 18x14x=12 x14x=65 23x=14x14 5X= X= X÷=X÷=12 X= X=×X÷=÷ X-0.25= 4+0.7X=1024.5x-x=28 X-5.7=2.15 15 5X-2X=18 3X+0.7=5 3.5×2= 4.2+x 26×1.5= 2x+10 0.5×1616×0.2=4x 13 9.25X=0.403 16.9÷X=0.3 X÷0.5=2.6 x1333 3 5x80 1.8 +6x54 6.7x 60.36.7 9 4x 40 2x+8=16 x/5=10 x+7x=8 9x-3x=6 6x-8=4 5x+x=9 x-8=6x 4/5x=20 2x-6=12 7x+7=14 6x-6=0 5x+6=11 2x-8=10 1/2x-8=4 x-5/6=7 3x+7=28 3x-7=26 9x-x=16 24x+x=50 6/7x-8=4 3x-8=30 6x+6=12 3x-3=1 5x-3x=4 2x+16=19 5x+8=19 14-6x=8 15+6x=27 5-8x=4 7x+8=15 9-2x=1 4+5x=9 10-x=8 8x+9=17 9+6x=14 x+9x=4+7 2x+9=17 8-4x=6 6x-7=12 7x-9=8 x-56=1 8-7x=1 x-30=12 6x-21=21 6x-3=6 9x=18 4x-18=13 5x+9=11 6-2x=11 x+4+8=23 7x-12=8 23 x5×14=14 1234x=56 2214x=12 23x-14x=14 X+8.3=10.7 15x 3 3x816 7(x-2)=2x+3 3x+9=2718(x-2)=270 12x=300-4x 7x+5.3=7.4 3x÷5=4.8 30÷x+25=85 1.4×8-2x=6 6x-12.8×3=0.06 410-3x=170 3(x+0.5)=21 0.5x+8=43 6x-3x=18 1.5x+18=3x 5×3-x÷2=8 0.273÷x=0.35 1.8x=0.972 x÷0.756=90 9x-40=5 x÷5+9=21 48-27+5x=31 10.5+x+21=56 x+2x+18=78 (200-x)÷5=30 (x-140)÷70=4 0.1(x+6)=3.3×0.4 4(x-5.6)=1.6 7(6.5+x)=87.5 (27.5-3.5)÷x=4 x+19.8=25.8 5.6x=33.6 9.8-x=3.8 75.6÷x=12.6 5x+12.5=32.3 5(x+8)=102 x+3x+10=70 3(x+3)=50-x+3 5x+15=60 3.5-5x=2 0.3×7+4x=12.5 x÷1.5-1.25=0.75 4x-1.3×6=2.6 20-9x=1.2×6.25 6x+12.8=15.8 150×2+3x=690 2x-20=4 3x+6=18 2(2.8+x)=10.4 (x-3)÷2=7.5 13.2x+9x=33.3 3x=x+100 x+4.8=7.2 6x+18=48 3(x+2.1)=10.5 12x-9x=8.7 13(x+5)=169 2x-97=34.2 3.4x-48=26.8 42x+25x=134 1.5(x+1.6)=3.6 2(x-3)=5.8 65x+7=42 9x+4×2.591 4.2 x+2.5x134 10.5x+6.5x=51 89x-43x=9.2 5x-45=100 1.2x-0.5x=6.3 23.4=2x=56