五年级数学上册复习简便运算高品质PPT学习教案

1、会计学1五年级数学上册复习简便运算高品质五年级数学上册复习简便运算高品质=1250.81.3 =(1250.8)1.3 =100 1.3 =1301251.30.8第1页/共24页 =0.251.20.9 =0.25(40.3)0.9 =(0.254)0.30.9 =10.30.9 =0.270.250.91.2第2页/共24页=(200-1)0.88=2000.88-10.88=176-0.88 =175.121990.88第3页/共24页9010.3= 90 （10+0.3）=9010+900.3=900+27=927第4页/共24页2.3715-2.375=2.37（15-5）=2.37

2、10=23.7第5页/共24页9.79.799= 9.71+9.799=9.7（1+99）=9.7100=970第6页/共24页10.96+1090.4=1090.6+1090.4=109（0.6+0.4）=1091=109第7页/共24页50.52.50.2=50.5（2.50.2）=50.55=10.1括号前面是除号，去掉括号括号前面是除号，去掉括号要变号，乘号变除号，除号要变号，乘号变除号，除号变乘号变乘号第8页/共24页2.4（3.65）=2.43.65=2.453.6=123.6=2第9页/共24页14.68-7.82-2.18=14.68-（7.82+2.18）=14.68-10=

3、4.68第10页/共24页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没有括号的同一级运算可以换位置第11页/共24页13.75-（6.38+3.75）=13.75-6.38-3.75=(13.75-3.75)-6.38=10-6.38=3.62第12页/共24页26.06-（9.06-5.6）=26.06-9.06+5.6=(26.06-9.06)+5.6=17+5.6=22.6特殊特殊括号前面是减号，去括号前面是减号，去掉括号要变号，加号掉括号要变号，加号变减号，

4、减号变加号变减号，减号变加号第13页/共24页 5.32-2.16-0.84=5.32-(2.16+0.84)=5.32-3=2.32 14.42.43=14.4(2.43)=14.47.2=2 12.319-1230.9=1231.9-1230.9=123（1.9-0.9）=1231=1230.2536=0.2549=19=9第14页/共24页 2.5160.7 =2.5(44)0.7=(2.54)(40.7) =10 2.8 =28 6.3302 =6.3(300+2)=6.3300+6.32=1890+12.6 =1902.6 1.268+81.74 = (1.26+1.74) 8 =3

5、8 = 24 1.251.191.6=1.251.19(80.2) =1.25(80.2)1.19 =(1.258)(0.21.19) =100.238=2.38 第15页/共24页1.252.5323201.25817.8(1.784)2.229.96.666.7=1.252.5(48)=(1.258)(2.54)=1010=100=320(1.258)=32010=32=17.81.784=14=0.25=2.22(33.3)+6.666.7=(2.223) 3.3+6.666.7=6.663.3+6.666.7=6.66(3.3+6.7)=6.6610=66.6第16页/共24页4.87.8780.5215.613.115.615.62.1(1.250.125)84.84.80.5=1.258-0.1258=10-1=9=4.87.8+7.85.2=7.8(4.8+5.2)=7.810=78=15.613.1-15.61-15.62.1=15.6(13.1-1-2.1)=15.610=156=4.81-4.80.5=4.8(1-0.5)=4.80.5=2.4第17页/共24页6.1-5.9 +3.9- 4.115.89+（6.75-5