脱式计算. 1 8 + 5 7 +6.875+ 2 7 86× 3 85 (

脱式计算. 1 8 + 5 7 +6.875+ 2 7 86× 3 85 ( 3 4 + 1 6 - 2 3 )×12.
2024-12-04 03:39:13
推荐回答(1个)
回答1:

(1)
1
8
+
5
7
+6.875+
2
7

=(0.125+6.875)+(
5
7
+
2
7
),
=7+1,
=8.

(2)86×
3
85
,改胡
=(85+1)×
3
85

=85×
3
85
+
3
85

=3
3
85



(3)核埋拦液银(
3
4
+
1
6
-
2
3
)×12,
=
3
4
×12+
1
6
×12-
2
3
×12,
=9+2-8,
=3.