yb56126
幼苗
共回答了14个问题采纳率:85.7% 举报
(1)67×
4
11 -
4
11 ,
=(66+1)×
4
11 -
4
11 ,
=66×
4
11 +1×
4
11 -
4
11 ,
=24 +
4
11 -
4
11 ,
=24;
(2)1.9-1.9×(1.9-1.9),
=1.9-1.9×0,
=1.9-0,
=1.9;
(3)0.7+3.9+4.3+6.1,
=(0.7+4.3)+(3.9+6.1),
=5+10,
=15;
(4)
8
9 × [
3
4 - (
7
16 -
1
4 )],
=
8
9 × [
3
4 +
1
4 -
7
16 ],
=
8
9 × [1 -
7
16 ],
=
8
9 ×
9
16 ,
=
1
2 .
1年前
4