五年级简便计算奥数题Word下载.docx
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2.0.125×
0.25×
0.5×
64
3.320÷
1.25÷
8
4.2.4×
7.6+7.6×
6.5+7.6+0.76
5.3.74×
5.8+62.6×
0.58
6.2005×
0.375-0.375×
1949+3.75×
2.4
7.2016+201.6+20.16+2.016
8.22.8×
98+45.6
9.5.2×
1111+6666×
0.8
10.999.9×
0.28-0.6666×
370
11.0.27÷
0.25
12.1.25×
3.14+125×
0.0257+1250×
0.00229
13.18.3×
0.25+5.3÷
0.4-3.13×
2.5
14.3.6×
31.4+43.9×
6.4(提示:
43.9=31.4+12.5)
15.75×
4.7+15.9×
25
二、附加题
1.计算:
20.05×
39+200.5×
4.1+40×
10.025(提示:
40×
10025=2×
20×
10.025=20×
20.05)
2.计算:
1.1+3.3+5.5+7.7+9.9+11.11+13.13+15.15+17.17+19.19
3.计算:
(1+0.12+0.23)×
(0.12+0.23+0.34)-(1+0.12+0.23+0.34)×
(0.12+0.23)
(2+1.23+2.34)×
(1.23+2.34+3.45)-(1.23+2.34)×
(2+1.23+2.34+3.45)
(提示:
令M=1.23+2.34,N=1.23+2.34+3.45,将原式化简为M,N的表达式)
4.比较下面两个乘积A,B的大小
A=9.8732×
7.2345
B=9.8733×
7.2344