怎样简便怎样算. 9×4×15           176-(76+38) 18+(159+82) 31+992÷32          900÷25÷4          125÷(50÷6)

问题描述:

怎样简便怎样算.
9×4×15          

176-(76+38)

18+(159+82)
31+992÷32          900÷25÷4          125÷(50÷6)

(1)9×4×15,
=9×(4×15),
=9×60,
=540;
(2)176-(76+38),
=176-76-38,
=100-38,
=62;
(3)18+(159+82),
=18+82+159,
=100+159,
=259;
(4)31+992÷32,
=31+31,
=62;
(5)900÷25÷4,
=900÷(25×4),
=900÷100,
=9;
(6)125÷(50÷6),
=125×6÷50,
=750÷50,
=15.