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脱式计算.能简算要简算33.5-5.3-4.7+16.5 9900÷25÷4 1÷(35+310) 24×(23+16-38) 1+0.45÷0.9-78 2017-(317+23)

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

脱式计算,能简算要简算
33.5-5.3-4.7+16.5
9900÷25÷41÷(
3
5
+
3
10
)
24×(
2
3
+
1
6
-
3
8
)
1+0.45÷0.9-
7
8
20
17
-(
3
17
+
2
3
)

(1)33.5-5.3-4.7+16.5,
=(33.5+16.5)-(5.3+4.7),
=50-10,
=40;

(2)9900÷25÷4,
=9900÷(25×4),
=9900÷100,
=99;

(3)1÷(
3
5
+
3
10
),
=1÷
9
10
,
=
10
9
;

(4)24×(
2
3
+
1
6
-
3
8
),
=24×
2
3
+24×
1
6
-24×
3
8
,
=16+4-9,
=20-9,
=11;

(5)1+0.45÷0.9-
7
8
,
=1+0.5-
7
8
,
=1.5-
7
8
,
=0.625;

(6)
20
17
-(
3
17
+
2
3
),
=
20
17
-
3
17
-
2
3
,
=1-
2
3
,
=
1
3
.