问题
解答题
|
答案
(1)33+125+67+75
=(33+67)+(125+75)
=100+200
=300;
(2)(80+8)×25
=80×25+8×25
=2000+200
=2200;
(3)38×101
=38×(100+1)
=38×100+38
=3800+38
=3838;
(4)(40-4)×25
=40×25-4×25
=1000-100
=900;
(5)65×99+65
=65×(99+1)
=65×100
=6500;
(6)800÷5÷4
=800÷(5×4)
=800÷20
=40;
(7)125×(27×8)
=(125×8)×27
=1000×27
=27000;
(8)25×48
=25×(4×12)
=(25×4)×12
=100×12
=1200;
(9)101×69-69
=(101-1)×69
=100×69
=6900.