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计算下面各题.能简算的要简算.①(67-56)÷142 ②710×3+310÷13 ③58+37+38+47 ④3-32×1021-27 ⑤27×39÷27×39 ⑥28×2627.

编辑:chaxungu时间:2026-04-27 13:18:59分类:小学数学题库

计算下面各题,能简算的要简算.
①(
6
7
-
5
6
)÷
1
42
②
7
10
×3+
3
10
÷
1
3
③
5
8
+
3
7
+
3
8
+
4
7
④3-
3
2
×
10
21
-
2
7
⑤
2
7
×
3
9
÷
2
7
×
3
9
⑥28×
26
27
.
①(
6
7
-
5
6
)÷
1
42
,
=(
6
7
-
5
6
)×42,
=
6
7
×42-
5
6
×42,
=36-35,
=1;

②
7
10
×3+
3
10
÷
1
3
,
=
7
10
×3+
3
10
×3,
=(
7
10
+
3
10
)×3,
=1×3,
=3;

③
5
8
+
3
7
+
3
8
+
4
7
,
=(
5
8
+
3
8
)+(
3
7
+
4
7
),
=1+1,
=2;

④3-
3
2
×
10
21
-
2
7
,
=3-
5
7
-
2
7
,
=3-(
5
7
+
2
7
),
=3-1,
=2;

⑤
2
7
×
3
9
÷
2
7
×
3
9
,
=
2
7
×
3
9
×
7
2
×
3
9
,
=
2
7
×
7
2
×
3
9
×
3
9
,
=
1
9
;

⑥28×
26
27
,
=(27+1)×
26
27
,
=27×
26
27
+
26
27
,
=26+
26
27
,
=26
26
27
.

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