简便计算:25乘24的简便方法 [计算下面各题,能简便的用简便方法计算.人5×3v×4&nbse;&nbse;&nbse;&nbse;&nbse;535×99&nbse;&nbse;&nbse;&nbse;&nbse;人03]

时间:2018-12-06 06:58:40 来源:易达学习网 本文已影响 易达学习网

题文

计算下面各题,能简便的用简便方法计算.
人5×3v×4&nbse;&nbse;&nbse;&nbse;&nbse;
535×99&nbse;&nbse;&nbse;&nbse;&nbse;人03-535÷5&nbse;&nbse;&nbse;&nbse;&nbse;
97-5人×v+4349×99+49&nbse;&nbse;&nbse;&nbse;&nbse;5v人0÷(5v人×5)
37+5人5+v3+575575+人5÷人5+55&nbse;&nbse;&nbse;&nbse;&nbse;5人5×3人×人5&nbse;&nbse;&nbse;&nbse;&nbse;&nbse;
55v×l0l-55v.

答案


(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.

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