用递等式计算,能巧算的要巧算.5096-96×3 2828-144-756 56÷8
1个回答

解题思路:(1)先算乘法,再算减法,

(2)运用减法的性质简算,

(3)从左向右进行计算,

(4)先算乘法,再算减法,

(5)先算除法,再算加法,

(6)先算乘法,再算加法.

(1)5096-96×3,

=5096-288,

=4808;

(2)2828-144-756,

=2828-(144+756),

=2828-900,

=1928;

(3)56÷8×30,

=7×30,

=210;

(4)573-73×6,

=573-438,

=135;

(5)49÷7+160,

=7+160,

=167;

(6)7×40+60,

=280+60,

=340.

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: 完成此题,应注意分析式中数据,掌握运算顺序,运用简便方法灵活计算.