天龙十部
春芽
共回答了13个问题采纳率:100% 举报
(1)12.76-(8.9+1.76),
=12.76-8.9-1.76,
=12.76-1.76-8.9,
=11-8.9,
=2.1;
(2)1.25×43+1
1
4 ×27+125%×30,
=1.25×43+1.25×27+1.25×30,
=1.25×(43+27+30),
=1.25×100,
=125;
(3)99×28,
=(100-1)×28,
=100×28-1×28,
=2800-28,
=2772;
(4)78×
3
79 ,
=(79-1)×
3
79 ,
=79×
3
79 -1×
3
79 ,
=3-
3
79 ,
=2
76
79 ;
(5)(
2
3 +
4
5 )÷(
1
3 -
1
4 ),
=
22
15 ÷
1
12 ,
=
88
5 ;
(6)35×(1-
4
7 )÷
5
9 ,
=35×
3
7 ÷
5
9 ,
=15÷
5
9 ,
=27.
1年前
8