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计算下面各题.能简算的必须简算. 87×386 56×115÷718 24×(38+16+512) 13÷5+23×15 29×0.375÷67 (34-316)×(29+13).

编辑:chaxungu时间:2026-04-27 14:17:36分类:小学数学题库

计算下面各题,能简算的必须简算.
87×
3
86
5
6
×
1
15
÷
7
18
24×(
3
8
+
1
6
+
5
12
)
1
3
÷5+
2
3
×
1
5
2
9
×0.375÷
6
7
(
3
4
-
3
16
)×(
2
9
+
1
3
).
(1)87×
3
86

=(86+1)×
3
86

=86×
3
86
+1×
3
86

=3+
3
86

=3
3
86


(2)
5
6
×
1
15
÷
7
18

=
1
18
×
18
7

=
1
7


(3)24×(
3
8
+
1
6
+
5
12

=24×
3
8
+24×
1
6
+24×
5
12

=9+4+10
=23;

(4)
1
3
÷5+
2
3
×
1
5

=
1
3
×
1
5
+
2
3
×
1
5

=(
1
3
+
2
3
)×
1
5

=1×
1
5

=
1
5


(5)
2
9
×0.375÷
6
7

=
2
9
×
3
8
÷
6
7

=
1
12
÷
6
7

=
7
72


(6)(
3
4
-
3
16
)×(
2
9
+
1
3

=
9
16
×
5
9

=
5
16