小升初 分数简便运算(一)
一.选择题(共1小题) 1.1﹣( A.
)﹣(
)﹣(B.
)﹣(
)的值是( ) C.
D.
二.填空题(共29小题) 2.(2012?湖北)计算:
3.用简便方法计算:
(1+++)×(+++)﹣(1++++)×(++)= _________ .
4.(2012?威宁县)+++…+
5.(2012?苏州)
6.计算:+
7.(2012?武汉模拟)计算: 8.﹣﹣ 9.
10.计算:2012÷2012 11.
12.计算:2006
13.+(+)+(++)+…+(
+
+
+…+
)= _________ .
= _________ . = _________ . = _________ .
等于 _________ .
﹣
﹣
﹣
= _________ .
= _________ .
+
+
+
= _________ .
+
+
+
+
+…+
+
= _________ .
= _________ .
= _________ .
14. 15.
16.计算:(1﹣ 17. 18. 19.( 20. 21. 22.计算:_________ .
=
= _________ .
+
+
+
+
= _________ .
)×(
+
+
)﹣(
+
+
+
)×(
+
)= _________ .
+
+
+…+
= _________ .
.
)×(1﹣
)…(1﹣
)= _________ .
= _________ . = _________ .
23.= _________ .
24.(2012?武汉模拟)计算: 25.
26.简便计算 (1)(2)(3) 27.计算5
= _________ .
= _________ .
.
+6+7+…+18
= _________ .
28.计算:
29.×+×+×+×+…+ 30.
= _________ .
×
+
×
= _________ .
= _________ .