解题思路:(1)先算除法,再算加法;
(2)利用加法交换律简算;
(3)先算减法,再算乘法;
(4)先算乘法,再算除法;
(5)把98看作100,多减去2再加上2即可;
(6)利用加法结合律简算.
(1)480÷32-15
=15-15
=0;
(2)67+400+233
=67+233+400
=300+400
=700;
(3)54×(71-33)
=54×38
=2052;
(4)72÷(12×3)
=72÷36
=2;
(5)205-98+46
=205-100+2+46
=105+2+46
=153;
(6)99+(101+136)
=99+101+136
=200+136
=336.
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: 整数四则混合运算的关键是搞清运算顺序,适当运用运算定律简算.