小升初计算专项练习(一)
年月日
一、脱式计算(能简便的简便运算)
(1)0.25×3.2×1.25
(2)9÷
1
5
-
3
5
÷9 (3
=0.25×(4×0.8)×1.25
=0.25×4×(0.8×1.25)
=1
=9×5-
3
5
×
1
9
=45-
1
15
=44
14
15
6.35-
1
5
-
3
2
5
+4.65
=6.35+4.65-(
1
5
+
3
2
5
)
=11-
14
5
=8
1
5
(4)69×75%+7.5×3.1
(5)(
5
7
+
2
27
)×7+
13
27
(6)
7
5
÷[
3
8
÷(
1
4
-
1
8
)]
=6.9×7.5+7.5×3.1
=7.5×(6.9+3.1)
=75
=
5
7
×7+
2
27
×7+
13
27
=5+(
14
27
+
13
27
)
=6
=
7
5
÷[
3
8
×8]
=
7
5
÷3
=
7
15
(7)
452
995
(8)
3
53.2 46.80.3
10
(9)
156
20
8623
...
小升初计算专项练习(答案版)