问题 解答题
怎样简便就怎样计算:
33+125+67+75
(80+8)×25
38×101(40-4)×25
65×99+65800÷5÷4
125×(27×8)25×48101×69-69.
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.

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