问题 填空题

根据运算定律填空.

(1)12.5×3.4×0.8=(______×______)×______

(2)4.36×2.5+______×2.5=(______+5.64)×______

(3)6.5×2.4+6.5×7.6=____________(__________________)

(4)(6+0.6)×0.25=__________________+__________________.

答案

(1)12.5×3.4×0.8=(12.5×8)×3.4;

(2)4.36×2.5+5.64×2.5=(4.36+5.64)×25;

(3)6.5×2.4+6.5×7.6=6.5×( 2.4+7.6);

(4)(6+0.6)×0.25=6×0.25+0.6×0.25.

故答案为:12.5,8,3.4;5.64,4.36,2.5;6.5,×2.4,+,7.6;6,×,0.25,0.6,×,0.25.

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