(30+6)×3=________×3+________×3
7×4+18×4=(________+________)×________
(40+4)×25=________×25+________×25
8×74+51×8=(________+________)×________.
网友回答
30 6 7 18 4 40 4 74 51 8
解析分析:根据乘法分配律进行解答即可.
解答:
(1)(30+6)×3,
=30×3+6×3,
=90+18,
=108;
(2)7×4+18×4,
=(7+18)×4,
=25×4,
=100;
(3)(40+4)×25,
=40×25+4×25,
=1000+100,
=1100;
(4)8×74+51×8,
=(74+51)×8,
=125×8,
=1000.
故