解:(1)999+452-2415÷23,
=999+452-105,
=1451-105,
=1346;
(2)180×26-105×18,
=4680-1890,
=2790;
(3)36÷1.8×4.2,
=20×4.2,
=84;
(4)0.36×1.25-0.099,
=0.45-0.099,
=0.351;
(5)(63.8-13.8)÷0.5-1.508,
=50÷0.5-1.508,
=100-1.508,
=98.492;
(6)(8.3+0.16)÷(1.01-0.995),
=8.46÷0.015,
=564;
(7)
+
+
÷
,
=
+
+
,
=
+
,
=
;
(8)95.8+4.52-4.52÷0.8,
=95.8+4.52-5.65,
=100.32-5.65,
=94.67;
(9)
×
+
÷4,
=
+
,
=
;
(10)
+3÷
,
=
+6,
=6
.
分析:(1)(8)先算除法,再算加法,最后算减法;
(2)同时运算两个乘法,再算减法;
(3)按照从左到右的顺序计算;
(4)先算乘法,再算减法;
(5)先算小括号里面的减法,再算括号外的除法,最后算括号外的减法;
(6)同时运算两个小括号里面的加法和减法,再算括号外的除法;
(7)先算除法,再从左到右计算;
(9)先同时运算乘法和除法,再算加法;
(10)先算除法,再算加法.
点评:本题考查了四则混合运算的计算顺序,计算时要想看清楚能否运用简算的方法,若不能就按照运算顺序一步步求解.