问题
解答题
写出计算过程并得出结果 (1)138×1
(2)
|
答案
(1)138×1
+23.3×(2-75%)-125%×38+(1+0.25)×28.7,1 4
=138×1.25+23.3×1.25-1.25×38+1.25×28.7,
=(138+23.3-38+28.7)×1.25,
=[(138-38)+(23.3+28.7)]×1.25,
=(100+52)×1.25,
=100×1.25+52×1.25,
=125+13×(4×1.25),
=125+13×5,
=125+65,
=190.
(2)
,12
×34 5
-43 4
×44 11 1 8 2
×114 7 2 3
=
,
×64 5
-15 4
×48 11 33 8
×18 7 35 3
=
,48-18 30
=
,30 30
=1.