问题
解答题
|
答案
(1)37+22+63+45,
=(37+63)+(22+45),
=100+67,
=167;
(2)530-475-25,
=530-(475+25),
=530-500,
=30;
(3)8×(125×ll),
=8×125×11,
=1000×11,
=11000;
(4)44×25,
=(4×11)×25,
=4×25×11,
=100×11,
=1100;
(5)72×125,
=8×125×9,
=1000×9,
=9000;
(6)64×99+64,
=(99+1)×64,
=100×64,
=6400;
(7)4900÷25÷4,
=4900÷(25×4),
=4900÷100,
=49;
(8)(100+4)×25,
=100×25+4×25,
=2500+100,
=2600;
(9)17×43-43×7,
=(17-7)×43,
=10×43,
=430.