解题思路:(1)根据除法的性质简算;
(2)运用加法交换律、结合律简算;
(3)运用乘法交换律、结合律简算;
(4)根据加法结合律和减法的性质简算.
(1)73÷36+105÷36+146÷36,
=(73+105+146)÷36,
=324÷36,
=9;
(2)11+12+13+14+15+16+17+18+19,
=(11+19)+(12+18)+(13+17)+(14+16)+15,
=30+30+30+30+15,
=30×4+15,
=120+15,
=135;
(3)25×125×8×4,
=(25×4)×(125×8),
=100×1000,
=100000;
(4)154-283+246-117,
=(154+246)-(283+117),
=400-400,
=0.
点评:
本题考点: 运算定律与简便运算;整数四则混合运算.
考点点评: 本题考查了四则混合运算,注意运算顺序和运算法则,灵活运用所学的运算定律进行简便计算.