考点:繁分数的化简,四则混合运算中的巧算
专题:计算问题(巧算速算)
分析:(1)变形为(8.37-1.37)-(3.25+2.25)再计算;
(2)将除法变为乘法,再根据乘法分配律计算;
(3)先计算除法,再算同分母加法,最后相加即可求解;
(4)先变形为3322×18+6678×18,再根据乘法分配律计算;
(5)将分母变形为2014+2012×2014-1,再根据乘法分配律计算,最后约分计算即可;
(6)先变形为(3800-38)÷38+(83000-83)÷83,再根据分配律计算.
解答:
解:(1)8.37-3.25-(1.37+2.25)
=(8.37-1.37)-(3.25+2.25)
=7-5.5
=1.5;
(2)3.375÷5
-
×
=3
×
-
×
=(3
-
)×
=3×
=
;
(3)9÷13+13÷9+11÷13+14÷9+6÷13
=
+
+
+
+
=(
+
+
)+(
+
)
=2+3
=5;
(4)9966×6+6678×18
=3322×18+6678×18
=(3322+6678)×18
=10000×18
=180000;
(5)
2013+2012×2014 |
2013×2014-1 |
=
2014+2012×2014-1 |
2013×2014-1 |
=
=1;
(6)3762÷38+82917÷83
=(3800-38)÷38+(83000-83)÷83
=100-1+1000-1
=1098.
点评:完成本题要注意分析式中数据,运用合适的简便方法计算.