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1、精品文档、小数加减乘除及混合运算（含简便运算）1. 计算下面各题，能简算的用简便方法算，并写出简算过程1.6 X3.9 X1.2535.72 +0.047 +0.323.6 +10.10.138X6.4+0.121+0.25 x(1.28 +3.2 )4.87 X2.34+48.7 X0.2666.25 + 0.25 X 668.04+(0.21 X 3.6 )0.486 0.01 3.9919.75+2.5-3.5517.5 X 2.3-7.5 X 2.31.25X 11X 4X 0.890+25+48.93X 5.78.93 X 3.38.93、直接写出得数：（ 10 分）0.27X3 =
2、7.2+0.6 =1.25X 8 =0.830.270.09 X 0.4 =10+0.1 =6.5+1.3 =2.8-1.09 =2.5X 4.4 =8.8X 101 =0. 45X2.5=0.8X1.25=0« 3X3* 6=0. 3 X 0* 3 =10X0, 07 =0. 3X1.4 =0.05X7=G 92X0.4 =0.2X0.26=a 14X4二0.02X0.1=L2X0.3 二6 2X0.4 =8. 2 + L8 =100-35. 22=2*3X4 =2* 5 X 0t 4 2.4X5 =0. 22 X 4 =3. 25X0. 5=0.9-0.52 =3. 99X1 =
3、0X3. 52 =12.5X8 =8-=-10 =10 丄 84 2=0. 43+3. 57=2.5X4X12=9X0.8=7. 5x-3x-a+3a+7a-1.05X100=1刊5=0. 96三3=1. 477 7=5.46=0.16.5X10=a 56X100=3. 78 X100=4刊8=1215X100=0.8X10=4. 08X100=MX0.2 =6 6X0.8 =3X0.9=2.5X0. 4二a6X(k 4二12.5X8=50 X 0, 04=80X0,3 =L 1X9=0.16 X 5=L 78+2.2 =9.64-0,6 =L2X0.5=0_74-0,01=2t 5X0.4=
4、12-3. 9二6" 2 66 二3.9+2.03=4.23.5=L 6+2,4X0.3=2.14-0.9 =27+456 + 73 二0* 3X0. 3二讥 2+2*8=0.94-0,01 =12<-0+ 3=2.870.7 =13-r4 =0+96-5-0+3=L5X0,4 =7Z 25=2. 3X07X0用二8-2. 5-精品文档U9T929"寸甲9.9LHQt L LOLhot寸寸.98Hr 8069去44ugxstn vdxcQC W9xg 心 呂X 二壬住 H&xgln wg 芒xug8 平ux«6 frDxg F/6X卜 9SX2 sx
5、gfNJ 営一 X3 二 X9S gxws evx目 s2x£¥six82 gxg一xe xs TOIMUXI® pmxsoTox 器riIATX9EEs Hxt .m "FXIg v soox 瑁寸 *6OX5V 9BXSO6吏丄HX6a pcixolr 仃9XOE 召X買 TSKPE i PXAIAXrs&XST 吏3*6養-窝SOXT2 8LX3C66x107 穴 2XEZ3X8T90 宀XSI gLXsxoooLnxws 66+6 6X6一 -sxsd6&XXX 7 -vxg 至u 呂0X66 .6 OCJXE sxgnggxsmT gLnxsisx 巧 弓 X 年寸.J0XS6H養w 茨XGZI 66KLn7" s-x s 3IXSZ slxgA Lrqxm zxg.mx寸 s 0X9G9 十疋 7XS# 二負二十週Ixsr-S t-x"1-8&x8z£9W劈X肉10精品文档1.35 切=0.416 -32 =3.64 -52 =精品文档91.2 -.8 =26-0.13 =10.625 -25 =2.7 - 7.5 =0.756 -.18 =210 -1.4 =126-45 =15 0.06 =51.3 -.27 =2.688 -0.56 =10-25=25.6-0.032=