1、单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,人教版五年级上册,分宜县凤阳中心学校 敖霞梅,复习简便运算,=1250.81.3,=,(,1250.8,),1.3,=100 1.3,=130,1251.30.8,=0.25,1.2,0.9,=0.25,(,40.3,),0.9,=,(,0.254,),0.30.9,=10.30.9,=0.27,0.250.91.2,=,(,200,
2、1,),0.88,=2000.88,-,10.88,=176-0.88,=175.12,1990.88,9010.3,=90,（,10,+,0.3,）,=9010,+,900.3,=900+27,=927,2.3715-2.375,=2.37,（,15,-,5,）,=2.3710,=23.7,9.7,9.799,=9.7,1,+9.799,=9.7,（,1,+99,）,=9.7100,=970,10.96+1090.4,=,109,0.6,+1090.4,=109,（,0.6+0.4,）,=1091,=109,50.52.50.2,=50.5,（,2.5,0.2,）,=50.55,=10.
3、1,括号前面是除号，去掉括号要变号，乘号变除号，除号变乘号,2.4,（,3.65,）,=2.43.65,=2.453.6,=123.6,=2,14.68-7.82-2.18,=14.68-,（,7.82,+,2.18,）,=14.68-10,=4.68,8.75,+3.37,-0.75,+4.63,=8.75,-0.75,+3.37,+4.63,=(8.75,-0.75),+(3.37,+4.63,),=8+8,=16,没有括号的同一级运算可以换位置,13.75-,（,6.38+3.75,）,=13.75,-6.38,-3.75,=(13.75,-3.75,)-6.38,=10,-6.38,=
4、3.62,26.06-,（,9.06-5.6,）,=26.06,-9.06,+5.6,=(26.06,-9.06,),+5.6,=17,+5.6,=22.6,特殊,括号前面是减号，去掉括号要,变号，加号,变减号，减号变加号,5.32-2.16-0.84,=5.32-,(,2.16,+,0.84,),=5.32-3,=2.32,14.42.43,=14.4,(,2.4,3,),=14.47.2,=2,12.319-1230.9,=,1231.9,-1230.9,=123,（,1.9-0.9,）,=1231,=123,0.2536,=0.2549,=19,=9,2.516,0.7,=2.5,(44
5、),0.7,=(2.5,4,)(,4,0.7),=10 2.8,=28,6.3302,=6.3(,300,+,2,),=6.3,300,+,6.3,2,=1890+12.6,=1902.6,1.268+81.74,=,(,1.26+1.74,),8,=38,=24,1.25,1.191.6,=1.251.19(80.2),=1.25,(,80.2,),1.19,=(1.25,8,)(,0.2,1.19),=100.238,=2.38,1.252.532,3201.258,17.8(1.784),2.229.9,6.666.7,=1.252.5(,48,),=(1.25,8,)(2.5,4,),
6、1010,=100,=320,(1.258),=32010,=32,=17.81.78,4,=14,=0.25,=2.22(,33.3,)+6.666.7,=(2.22,3,),3.3,+6.666.7,=6.663.3+6.666.7,=6.66(3.3+6.7),=6.6610,=66.6,4.87.8,780.52,15.613.1,15.6,15.62.1,(1.25,0.125)8,4.8,4.80.5,=1.258-0.1258,=10-1,=9,=4.87.8+,7.85.2,=7.8(4.8+5.2),=7.810,=78,=15.613.1-15.6,1,-15.62.1,=15.6(13.1-1-2.1),=15.610,=156,=4.8,1,-4.80.5,=4.8(1-0.5),=4.80.5,=2.4,6.1-5.9+,3.9-4.1,15.89+,（,6.75-5.89,）,31.2-,（,21.2-8.8,）,25.8-13.6-5.8-6.4,ppt,课件下载站,(,),专注免费,ppt,课件下载,致力提供,ppt,课件免费下载,教案,试卷,教学论文,.doc,等教学资源服务,教师群号,46332927(,小学,)56954784(,中学,)QQ 904007915,
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