解题思路:(1)先算乘法,再算减法,
(2)运用加法、减法的运算定律进行计算,
(3)分别算出除法、乘法,再算加法,
(4)先算括号里的除法,再算括号里的加法,最后算括号外的乘法,
(5)先算小括号的减法,再算中括号的除法,最后算括号外的除法.
(1)7280-280×12,
=7280-3360,
=3920;
(2)1650-78-222+350,
=(1650+350)-(78+222),
=2000-300,
=1700;
(3)1230÷6+15×13,
=205+195,
=400,;
(4)41×(982+760÷38),
=41×(982+20),
=41×1002,
=41082;
(5)1472÷[﹙2100-1364﹚÷23],
=1472÷[736÷23],
=1472÷32,
=46;
点评:
本题考点: 整数四则混合运算;运算定律与简便运算.
考点点评: 考查了整数四则混合运算顺序,灵活运用运算定律进行简算.