简便运算
六年级奥数
精品文档
简便运算练习题六年级奥数
一、定义新运算练习
1. 设a?b?3a?b?
2.设p、q是两个数,规定:
3.设M、N是两个数,规定
4.如果2?1?1
2,3?2?1
33,4?3?1
444,那么?? M?N?MN?NM,求10?20?1412,求。 p?q?p??2。
求30?。。
5.如果1?2?1?2, ?3?2?3?4,.........,
5?6?5?6?7?8?9?10,在x?3?54中,x?2a-b6.对两个整数a和
b定义新运算"?":a?b?,求6?4?9?8.
例1:13
例2:3.5?1
9
例3:45?2.08?1.5?37.62?11.1?2.6?778
48?1.08?1.2?56.2?2.09?1.8?73.65?425?4.25?16014?125%
?112?457?17??1?7??4?3?0.7514.15?7?6????2.1213?413?2
0??8975?0.25?934?76?9.750.9999?0.7?0.1111?2.7
例4:6.8?16.8?19.3?3.2139?137
1 / 5
精品文档
138?137?1
13.4?57.8?45.3?5.6
例5:53.5?35.3?53.5?43.2?78.5?46.235?12.1?235?42.2?135?5
4.3
3.75?735?3
8?5730?16.2?62.5
六年级奥数练习
一、定义新运算练习
1. 设a?b?3a?b?,求。
2.设p、q是两个数,规定: p?q?p2??2。求30?。
3.设M、N是两个数,规定M?N?
4.如果2?1?12MN1?,求10?20?。 NM4111,3?2?,4?3?,那么??233444
5.如果1?2?1?2, ?3?2?3?4,.........,5?6?5?6?7?8?9?10,在x?3?54中,x?a和b定义新运算"?":a?b?6.对两个整数2a-b,求6?4?9?8.
例1:13
例2:3.5?1
97?17?17??7??4?3??0.7514.15??7?6??2.1213?413?20??81
143?125%?1?75?0.25?9?76?9.7425421?425?4.25?
2 / 5
精品文档
0.9999?0.7?0.1111?2.560
例3:45?2.08?1.5?37.62?11.1?2.6?778
48?1.08?1.2?56.2?2.09?1.8?73.6
例4:
6.8?16.8?19.3?3.2139?1371?137? .4?57.8?45.3?5.138138
例5:
53.5?35.3?53.5?43.2?78.5?46.235?12.1?235?42.2?135?5
4.3
33.75?735??5730?16.2?62.8
[小学 六年级数学]小学数学简便运算练习题
12.06,5.07,2.940.34,9.76,10.3×4
34?4?1.1.25?, ,
41.06,19.72,20.211
700?14?18.6?2.5?0.13×
33
×3?×5×88
234357
×0. 17+,71,37177913
5
9
233455,3+ +2,88799
3 / 5
精品文档
223
+7+355
1717
??1919
1313×727
5.68, 19.68, ,
1.25× 0.25×1.25× 0.74? ,
74) 100
24× ×7×
128637520389.3?10093
)
0.92×1.41,0.92×8.511.6,18.4×9
5
9999+999+99+ 1.25×88
7.6?0.2103-725×2-725
×12700×25×3
14×20×525×25
165×713-35×7131.3×11.6,1.6×1.5
×4821-99.2×12.5×2.5?0.125.8×9.9,0.325
×,2185,810×4×7
× ×804×9
8×14×125× 16×25×5×259,468,741,533×4
4 / 5
精品文档
×5
40×7×3×25×125
102×7.3?5.1 ×2.5×4
×6×4×5.6×0.2×.6×9.×6)1.06(
5 / 5