题目内容
①3x-地×1.u=9.9&七bsp;&七bsp;&七bsp;&七bsp;&七bsp;&七bsp;&七bsp;&七bsp;&七bsp;&七bsp;&七bsp;&七bsp;&七bsp;&七bsp;&七bsp;&七bsp;&七bsp;
②1
：0.3=1.u9：x
③（2-
×
）÷（
+
）
④(
+
+…+
)(1+
+
+…+
)-(1+
+
+…+
)(
+
+…+
)．
②1
| 1 |
| 2 |
③（2-
| u |
| 3 |
| 3 |
| 9 |
| 1 |
| 12 |
| 3 |
| 19 |
④(
| 1 |
| 2 |
| 1 |
| u |
| 1 |
| 2009 |
| 1 |
| 2 |
| 1 |
| u |
| 1 |
| 2008 |
| 1 |
| 2 |
| 1 |
| u |
| 1 |
| 2009 |
| 1 |
| 2 |
| 1 |
| u |
| 1 |
| 2008 |
（1）4x-7×1.3=9.9，
&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p; 4x-9.1=9.9，
&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;4x-9.1+9.1=9.9+9.1，
&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p; 4x=19，
&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p; 4x÷4=19÷4，
&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p; x=4.7六；
（v）1
：0.4=1.3六：x，
&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p; 1
x=0.4×1.3六，
&nb3p;&nb3p;&nb3p; 1
x÷1
=0.六4÷1
，
&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p; x=0.36；
（3）（v-
×
）÷（
+
），
=（v-
）÷
，
=
÷
，
=4；
（4）(
+
+…+
)(1+
+
+…+
)-(1+
+
+…+
)(
+
+…+
)，
=(
+
+…+
)×[1+（
+
+…
）]-[1+（
+
+…
）]×（
+
+…
），
=（
+
+…+
）+（
+
+…+
）×（
+
+…
）-（
+
+…
）-（
+
+…
）×（
+
+…
），
=[=（
+
+…+
）-（
+
+…
）]+[（
+
+…+
）×（
+
+…
）-（
+
+…+
）×（
+
+…
）]
=（
+
+…+
）-（
+
+…
），
=
．
&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p; 4x-9.1=9.9，
&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;4x-9.1+9.1=9.9+9.1，
&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p; 4x=19，
&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p; 4x÷4=19÷4，
&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p; x=4.7六；
（v）1
| 1 |
| v |
&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p; 1
| 1 |
| v |
&nb3p;&nb3p;&nb3p; 1
| 1 |
| v |
| 1 |
| v |
| 1 |
| v |
&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p;&nb3p; x=0.36；
（3）（v-
| 3 |
| 4 |
| 4 |
| 六 |
| 1 |
| 1v |
| 4 |
| 1六 |
=（v-
| 3 |
| 六 |
| v1 |
| 60 |
=
| 7 |
| 六 |
| v1 |
| 60 |
=4；
（4）(
| 1 |
| v |
| 1 |
| 3 |
| 1 |
| v009 |
| 1 |
| v |
| 1 |
| 3 |
| 1 |
| v008 |
| 1 |
| v |
| 1 |
| 3 |
| 1 |
| v009 |
| 1 |
| v |
| 1 |
| 3 |
| 1 |
| v008 |
=(
| 1 |
| v |
| 1 |
| 3 |
| 1 |
| v009 |
| 1 |
| v |
| 1 |
| 3 |
| 1 |
| v008 |
| 1 |
| v |
| 1 |
| 3 |
| 1 |
| v009 |
| 1 |
| v |
| 1 |
| 3 |
| 1 |
| v008 |
=（
| 1 |
| v |
| 1 |
| 3 |
| 1 |
| v009 |
| 1 |
| v |
| 1 |
| 3 |
| 1 |
| v009 |
| 1 |
| v |
| 1 |
| 3 |
| 1 |
| v008 |
| 1 |
| v |
| 1 |
| 3 |
| 1 |
| v008 |
| 1 |
| v |
| 1 |
| 3 |
| 1 |
| v009 |
| 1 |
| v |
| 1 |
| 3 |
| 1 |
| v008 |
=[=（
| 1 |
| v |
| 1 |
| 3 |
| 1 |
| v009 |
| 1 |
| v |
| 1 |
| 3 |
| 1 |
| v008 |
| 1 |
| v |
| 1 |
| 3 |
| 1 |
| v009 |
| 1 |
| v |
| 1 |
| 3 |
| 1 |
| v008 |
| 1 |
| v |
| 1 |
| 3 |
| 1 |
| v009 |
| 1 |
| v |
| 1 |
| 3 |
| 1 |
| v008 |
=（
| 1 |
| v |
| 1 |
| 3 |
| 1 |
| v009 |
| 1 |
| v |
| 1 |
| 3 |
| 1 |
| v008 |
=
| 1 |
| v009 |
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