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计算.(1)956×4.25+414×16(2)[22.5+(335+1.8-1.21×511)]÷40%(3)310×38+115×716+15×312(4)718×92+161313-154×16

编辑:chaxungu时间:2026-04-27 13:18:53分类:小学数学题库

计算.
(1)9
5
6
×4.25+4
1
4
×
1
6

(2)[22.5+(3
3
5
+1.8-1.21×
5
11
)]÷40%
(3)
3
10
×
3
8
+
1
15
×
7
16
+
1
5
×3
1
2

(4)
7
18
×
9
2
+
1
6
13
1
3
-
15
4
×
16
5
.(1)9
5
6
×4.25+4
1
4
×
1
6
,
=(9
5
6
+
1
6
)×4.25,
=10×4.25,
=42.5;

(2)[22.5+(3
3
5
+1.8-1.21×
5
11
)]÷40%,
=[22.5+(3.6+1.8-0.55)]÷40%,
=[22.5+(5.4-0.55)]÷40%,
=[22.5+4.85]÷0.4,
=27.35÷0.4,
=68.375;

(3)
3
10
×
3
8
+
1
15
×
7
16
+
1
5
×3
1
2
,
=
9
80
+
7
240
+
7
10
,
=
34
240
+
168
240
,
=
101
120
;

(4)
7
18
×
9
2
+
1
6
13
1
3
-
15
4
×
16
5
,
=
7
4
+
1
6
13
1
3
-12
,
=
23
12
4
3
,
=
23
12
×
3
4
,
=
23
16
.