脱式计算,能简算的要简算①2006-4848÷96×2.4 ②31.9×18-8×31.9 ③ 13 14 + 13

2025-04-12 12:59:40
推荐回答(1个)
回答1:

①2006-4848÷96×2.4,
=2006-50.5×2.4,
=2006-121.2,
=1884.8;

②31.9×18-8×31.9,
=31.9×(18-8),
=319;

13
14
+
13
15
+
1
14
+
2
15

=(
13
14
+
1
14
)+(
13
15
+
2
15
),
=1+1,
=2;

8
9
×[
3
4
-(
15
16
-
3
4
)],
=
8
9
×[
3
4
-(
15
16
-
12
16
)],
=
8
9
×[
12
16
-
3
16
],
=
8
9
×
9
16

=
1
2