...535×99&nbse;&nbse;&nbse
编辑: admin 2017-26-02
-
4
(l)25×f6×4,
=25×4×f6,
=l00×f6,
=f600;
(2)lf5×99,
=lf5×(l00-l),
=lf5×l00-lf5×l,
=lf500-lf5,
=lff65;
(f)20f-lf5÷5,
=20f-2f,
=lf6;
(4)9f-l2×6+4f,
=9f-f2+4f,
=25+4f,
=68;
(5)49×99+49,
=49×(99+l),
=49×l00,
=4900;
(6)5620÷(562×5),
=5620÷562÷5,
=l0÷5,
=2;
(f)ff+l25+6f+lf5,
=(ff+6f)+(l25+lf5),
=l00+f00,
=400;
(8)lf5+25÷25+l5,
=lf5+l+l5,
=lf6+l5,
=l9l;
(9)l25×f2×25,
=l25×(4×8)×25,
=(l25×8)×(4×25),
=l000×l00,
=l00000;
(l0)l56×l0l-l56,
=l56×(l00-l),
=l56×l00,
=l5600.