六年级分数混合运算简便计算题 小学六年级分数混合运算简便方法

\u7ed9\u70b9\u516d\u5e74\u7ea7\u6570\u5b66\u5206\u6570\u6df7\u5408\u8fd0\u7b97\u9898\u548c\u7b80\u4fbf\u8fd0\u7b97\u9898

\u6211\u8fd9\u91cc\u6709\u516d\u5e74\u7ea720\u9053\u8131\u5f0f\u8ba1\u7b97(\u6df7\u5408\u8fd0\u7b97\u9898\u548c\u7b80\u4fbf\u8fd0\u7b97\u9898,\u6211\u8fd8\u7ed9\u4f60\u4e00\u4e9b\u89e3\u65b9\u7a0b\u7684\u9898\uff0c\u516d\u5e74\u7ea7\u6c34\u5e73\u7684)\uff0c\u5e0c\u671b\u5bf9\u4f60\u6709\u5e2e\u52a9!!!
0.4\u00d7125\u00d725\u00d70.8
1.25\u00d7\uff088+10\uff09
9123-\uff08123+8.8\uff09
1.24\u00d78.3+8.3\u00d71.76
9999\u00d71001
14.8\u00d76.3-6.3\u00d76.5\uff0b8.3\u00d73.7
1.24+0.78+8.76
933-157-43
4821-998
32\u00d7125\u00d725
9048\u00f726
2881\u00f7 43
3.2\u00d742.3\u00d73.75-12.5\u00d70.423\u00d716
1.8+18\u00f71.5-0.5\u00d70.3
6.5\u00d78+3.5\u00d78-47
(80-9.8)\u00d75\u5206\u4e4b2-1.32
8\u00d77\u5206\u4e4b4\u00f7[1\u00f7(3.2-2.95)]
2700\u00d7\uff08506\uff0d499\uff09\u00f7900
33.02\uff0d\uff08148.4\uff0d90.85\uff09\u00f72.5
\uff081\u00f71\uff0d1\uff09\u00f75.1
18.1\uff0b\uff083\uff0d0.299\u00f70.23\uff09\u00d71
\u6700\u540e\u795d\u5b66\u4e60\u8fdb\u6b65!!!
\u89e3\u65b9\u7a0b\uff0c\u516d\u5e74\u7ea7\u6c34\u5e73.
X - 15%X = 68 3.5X\uff0b1.8\uff1d12.3 3.6X\u00f72\uff1d2.16 0.8X\uff0d4\uff1d1.6
5X\u00f72\uff1d10 X\uff0d0.25X\uff1d3 4+0.7X=102 X-0.125X=8 x\uff0d0.375x=3/4
5 X\uff0d2.4\u00d75\uff1d8 15X\u00f72\uff1d60 4X\uff0bX\uff1d3.15 3.4X\uff0b1.8\uff1d8.6
5X\uff0dX\uff1d2.4 1.5X\uff0dX\uff1d1 6.6X\uff0d6X\uff1d1.8 x - 0.8x = 16+6
X\uff0b25%X=90 12x=300-4x 30\u00f7x+25=85 410-3x=170 3(x+0.5)=21 0.5x+8=43 6x-3x=18 1.5x+18=3x 5\u00d73-x\u00f72=8 9x-40=5 x\u00f75+9=21 48-27+5x=31 10.5+x+21=56 x+2x+18=78 (200-x)\u00f75=30 (x-140)\u00f770=4 0.1(x+6)=3.3\u00d70.4 4(x-5.6)=1.6 7(6.5+x)=87.5 (27.5-3.5)\u00f7x=4 x+19.8=25.8 5.6x=33.6 9.8-x=3.8 75.6\u00f7x=12.6 5x+12.5=32.3 5(x+8)=102 x+3x+10=70 3(x+3)=50-x+3 5x+6=11 2x-8=10 1/2x-8=4 12\uff0b34x=56 22\uff0d14x=12 54-X=24 7X=49 126\u00f7X=42 13+A=28.5 2.4X=26.4 70%X + 20%X = 3.6 2X\uff0b7X\uff1d9/10 180\uff0b6X\uff1d330 2.2X\uff0d1\uff1d10 X\uff0d0.8X\uff1d10 X\uff0b 2/5X\uff1d21
\u6700\u540e\u795d\u5b66\u4e60\u8fdb\u6b65!!!\u6700\u540e\u795d\u5b66\u4e60\u8fdb\u6b65!!!

\u7b2c\u4e00\u9898\uff1a\uff087/12-14/3\u00f74/3\uff09\u00f749/25
=\uff087/12-14/4\uff09\u00f749/25
=\uff087/12-42/12\uff09\u00f749/25
=\uff08-36/12\uff09\u00f749/25
=-25*3/49=-75/49
\u7b2c\u4e8c\u9898\uff1a\uff085.2\u00d74.8+4.8\u00d74.8\uff09\u00f72/13
=[\uff085.2+4.8\uff09\u00d74.8]\u00d713/2
=48\u00d713/2=13\u00d724=312
\u7b2c\u4e00\u9898\u662f\u8ba9\u4f5c\u9898\u65f6\u5316\u89e3\u7e41\u5206\u65f6\uff0c\u5bf9\u7ea6\u5206\u7684\u638c\u63e1\uff1b\u7b2c\u4e8c\u9898\u4e24\u4e2a\u52a0\u6570\u6709\u76f8\u540c\u4e58\u6570\uff0c\u4e0d\u76f8\u540c\u7684\u53c8\u521a\u597d\u76f8\u52a0\u7b4910 \uff0c\u5176\u5b83\u7684\u5c31\u597d\u7406\u89e3\u4e86\u3002\u5e0c\u671b\u53ef\u4ee5\u6210\u4e3a\u4f60\u7684\u7406\u60f3\u7b54\u6848\uff01

题：5/9X(9/5+18) 5/9X5/6+4/9÷6/5
＝5/9×9/5＋5/9×18 ＝5/9×5/6＋4/9×5/6
＝1＋10 ＝（5/9+4/9）×5/6
＝11 ＝1×5/6
＝5/6

13/14-15/28÷5/8 4÷4/5-4/5÷4
＝13/14－15/28×8/5 ＝4×5/4－4/5×1/4
＝13/14－3/7×2 ＝5＋1/5
＝13/14－6／7 ＝26/5
＝1/14

(5/6-3/4)÷3/8 7/11÷[2/5-(1-7/10)}
＝（5/6－3/4）×8/3 ＝7/11÷[2/5－3/10]
＝5/6×8/3－3/4×8/3 ＝7/11÷1/10
＝20／9－2 ＝70/11
＝2/9

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