北师大版小学四年级数学解方程

《北师大版小学四年级数学解方程》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。

1、北师大四年级数学《解方程练习一》方程：含有未知数的等式叫做方程。方程的解：使方程成立的未知数的值叫做方程的解。解方程：求方程的解的过程叫做解方程。解方程的依据：1.等式性质（①等式两边同时加上或减去同一个数，等式仍然成立；②等式两边同时乘以或除以同一个数，等式仍然成立。）2.加减乘除法的变形。加法：加数1+加数2=和加数1=加数2=减法：被减数–减数=差被减数=减数=乘法：乘数1×乘数2=积乘数1=乘数2=除法：被除数÷除数=商被除数=除数=constructionqualityacceptanceandassessmentRegulation(Pr

2、ofessionalEdition)(DL/T5210.2-2009~DL/T5210.8-2009);1.9thequalitycheckoutandevaluationofelectricequipmentinstallationengineeringcode(DL/T5161.1-2002~5161.17-2002);1.10thenormsofconstructionsupervision,theelectricpowerconstructionsupervisionregulations一、解方程：例1、8+x=9.4y+3.5=10x+3

3、2=76例2、y-23=45X-4.5=5.6X-4=2.5例3、12-x=8.513-X=4.35.4-X=4.2例4、x÷4=15x÷6=12X÷3.2=6.4例5、36÷x=1810÷y=52.5÷X=0.5例6、8x=1283X=2.74.2X=8.4例7、特殊题型4y-24=162.5x÷6=2.53x+2.4x=10.8constructionqualityacceptanceandassessmentRegulation(ProfessionalEdition)(DL/T5210.2-2009~DL/T5210.8-2009);1.9t

4、hequalitycheckoutandevaluationofelectricequipmentinstallationengineeringcode(DL/T5161.1-2002~5161.17-2002);1.10thenormsofconstructionsupervision,theelectricpowerconstructionsupervisionregulations（26-x）÷12=0.535÷（x+4）=710.7+x=215.3x-0.9x=14.732.8-9x=17.57×8+4x=12820x-50=5028+6x=

5、8832-22x=1024-3x=310x×（5+1）=6099x=100-x56-2x=204y+2=63x+6=1816+8x=402x-8=84x-3×9=298x-3x=1052（x+3）=1012x-9x=96x+18=4856x-50x=3078-5x=28constructionqualityacceptanceandassessmentRegulation(ProfessionalEdition)(DL/T5210.2-2009~DL/T5210.8-2009);1.9thequalitycheckoutandevaluationof

6、electricequipmentinstallationengineeringcode(DL/T5161.1-2002~5161.17-2002);1.10thenormsofconstructionsupervision,theelectricpowerconstructionsupervisionregulations32y-29y=389–9x=8012（y-1）=2453x-90=1655x-25x=6075y÷75=123y÷23=234x-20=080y+20=100-20y80+5x=1003x÷8=665x+35=10019y+y=

7、4025-5x=1579y+y=8042x+28x=14078y+2y=16088-4x=80-2x51y-y=10085y+1=y+8645x-50=40-45xconstructionqualityacceptanceandassessmentRegulation(ProfessionalEdition)(DL/T5210.2-2009~DL/T5210.8-2009);1.9thequalitycheckoutandevaluationofelectricequipmentinstallationengineeringcode(DL/T5161

8、.1-2002~5161.17-2002);1.10thenormsofconstructionsuperv