脱式计算. 48÷8×12(75+25)×425×4×6170×3-50028×5×2789-26×3.
网友回答
解:(1)48÷8×12,
=6×12,
=72;
(2)(75+25)×4,
=75×4+25×4,
=300+100,
=400;
(3)25×4×6,
=100×6,
=600;
(4)170×3-500,
=510-500,
=10;
(5)28×5×2,
=140×2,
=280;
(6)789-26×3,
=789-78,
=711.
解析分析:(1)(3)(4)(5)(6)依据整数四则运算计算顺序解答,(2)运用乘法分配律解答.
点评:本题考查知识点(1)整数四则运算计算方法,(2)乘法分配律运用.