解题思路:(1)依据四则运算计算方法解答,
(2)(3)(4)运用乘法分配律解答.
(1)35÷[7/5]+[5/7],
=25+[5/7],
=25[5/7];
(2)(40+4+0.4)×2.5,
=40×2.5+4×2.5+0.4×2.5,
=100+10+1,
=111;
(3)[5/9]×[7/13]+[6/13]×[5/9],
=([7/13+
6
13])×[5/9],
=1×[5/9],
=[5/9];
(4)([2/27]+[2/23])×27×23,
=[2/27]×27×23+[2/23]×27×23,
=46+54,
=100.
点评:
本题考点: 运算定律与简便运算.
考点点评: 解答此类题型的重点是:依据题干中各数的特点,正确选择并运用简便算法解答.