55x25+25x44+25简便运算
55x25+25x44+25简便运算
25x55+25x44+25x1
=25 x (55+44+1)
=25 x 100
=2500
55x25+25x43简便运算
55x25+25x43
=25x(55+43)
=25x(100-2)
=25x100-25x2
=2500-50
=2450
答题不易,望采纳~~~~~~~
5x44x25用简便运算
5×11×4×25=5500
25x200+25x4 简便运算
25x(200+4 )
等于5100
(43x25+25x47)x40简便运算
(43x25+25x47)x40
=[25x(43+47)]x40
=[25x90]x40
=25x90x40
=25x40x90
=1000x90
=90000
25x47 53x25简便运算
25x47+ 53x25简便运算
=25×(47+53)
=25×100
=2500
(12.5x25)x4简便运算
(12.5×25)×4
= 12.5×(25×4)(依据:乘法结合律 )
=12.5×100
=1250
简便运算35x4+35x25
35×4+35×25
=35×(4+25)
=35×29
=35×30-35×1
=1050-35
=1015
75x46-46x25简便运算
75x46-[(46x25)x2 ]÷2
=46x[(75-25)x2 ]÷2
=46x[50x2 ]÷2
=46x100÷2
=4600÷2
=2300
76x25+25x24简便运算
(76+24)×25=2500
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