b2_q
幼苗
共回答了16个问题采纳率:100% 举报
(1) 61
3
4 -15.37+ 38
1
4 -34.63,
=( 61
3
4 + 38
1
4 )-(15.37+34.63),
=100-50,
=50;
(2)24×(
3
8 +
5
6 -
3
4 ),
=24×
3
8 +24×
5
6 -24×
3
4 ,
=9+20-18,
=11;
(3)360÷[56×(
3
7 -
3
8 )],
=360÷[56×
3
7 -56×
3
8 ],
=360÷[24-21],
=360÷3,
=120;
(4)(
6
13 ×1.7+
7
13 ×1.7)÷
7
10 ,
=(
6
13 +
7
13 )×1.7×
10
7 ,
=1×
17
10 ×
10
7 ,
=
17
7 ;
(5)80.7×8.7+8.07×13,
=8.07×87+8.07×13,
=8.07×(87+13),
=8.07×100,
=807;
(6)
8
9 ×[
3
5 -(
9
16 -
2
5 )],
=
8
9 ×[
3
5 -
9
16 +
2
5 ],
=
8
9 ×[1-
9
16 ],
=
8
9 ×
7
16 ,
=
7
18 .
1年前
9