Question

752×0.25+41.5×25+0.033×250的巧算怎么做？

Answer 1

752×0.25+41.5×25+0.033×250
=7.52×25+41.5×25+0.33×25【提取25】
=25×(7.52+41.5+0.33)
=25×49.35
=25×(50-0.6-0.05)
=1250-15-1.25
=1250-16.25
=1233.75

Answer 2

752×0.25+41.5×25+0.033×250=
752×0.25+4150×0.25+33×0.25＝（752+4150+33）×0.25＝4935×1/4=4935÷4=1233.75
观察数字特点，三个乘法式子均有25这个数字，通过挪小数点来提取共同的乘数0.25。括号里相加等于4935，0.25化成分数四分之一，然后用4935除以4等于1233.75

Answer 3

752×0.25+41.5×25+0.033×250
=7.52×25+41.5×25+25×0.33
=25×（7.52+41.3+0.33）
=25×49.15
=100÷4×49.15
=4915÷4
=1228.75

Answer 4

752×0.25+41.5×25+0.033×250
=7.52×25+41.5×25+0.33×25
=25x(7.52+41.5+0.33)
=25x(50-0.65)
=25x50 +25x0.65
=1250+16.25
=1266.25

Answer 5

752x0.25+41.5x25+0.033x250
7.52x25+41.5x25+0.33x25
(7.52+41.5+0.33)x25
49.35x25
=1233.75