问题
解答题
1800÷5×62
90+186-84÷42
491-(25+20)×4
365×8×125×2
57×48+52×57
69×[(580-445)÷9].
答案
(1)1800÷5×62,
=360×62,
=22320;
(2)90+186-84÷42,
=90+186-2,
=276-2,
=274;
(3)491-(25+20)×4,
=491-45×4,
=491-180,
=311;
(4)365×8×125×2,
=(365×2)×(8×125),
=730×1000,
=730000;
(5)57×48+52×57,
=(48+52)×57,
=100×57,
=5700;
(6)69×[(580-445)÷9],
=69×[135÷9],
=69×15,
=1035.