考點:整數(shù)四則混合運算,分數(shù)的四則混合運算,小數(shù)四則混合運算
專題:運算順序及法則
分析:掌握整數(shù)分數(shù)小數(shù)的四則混合運算的運算順序,按照計算法則依次計算,有括號的先算括號里面的,再算括號外面的.
解答:
解:(1)2037-2037÷21
=2037-97
=1940;
(2)4375+884÷26×25
=4375+34×25
=4375+850
=5225;
(3)8.5+(5.6-4.8)×13
=8.5+0.8×13
=8.5+10.4
=18.9;
(4)[9.2+0.8×(9-7.75)]÷0.4
=[9.2+0.8×1.25]÷0.4
=[9.2+1]÷0.4
=10.2÷0.4
=25.5;
(5)(
+
)÷
=
×+
×=
+
=
;
(6)2.25×1.8+1.25×0.18
=2.25×1.8+0.125×1.8
=1.8×(2.25+0.125)
=1.8×2.375
=4.275;
(7)[17.1-17.1÷(3.1-2
)]×599
=[17.1-17.1÷1]×599
=0×599
=0.
點評:這道題主要考查整數(shù)分數(shù)小數(shù)的四則混合運算,掌握運算順序,做這類問題主要是靠認真仔細.