脱式计算:3×8.7+8.7×3.7( 1 3 - 1 6 + 1 4 )×12 7 4

脱式计算:3×8.7+8.7×3.7( 1 3 - 1 6 + 1 4 )×12 7 4 × 5 8 + 1 4 ÷ 8 5 .
2025-04-05 00:35:10
推荐回答(1个)
回答1:

(1)3×8.7+8.7×3.7,
=26.1+32.19,
=58.29;

(2)(
1
3
-
1
6
+
1
4
)×12,
=
1
3
×12-
1
6
×12+
1
4
×12,
=4-2+3,
=5;

(3)
7
4
×
5
8
+
1
4
÷
8
5

=(
7
4
+
1
4
)×
5
8

=
8
4
×
5
8

=1
1
4