题目内容

计算,能简算的要简算
1.2-0.5×1.8÷0.9 8×7×1.25
5
16
×
11
19
×3+
27
19
×
15
16
3
8
-
3
8
÷
8
3
)×
16
9
3
5
×
8.8+0.6×
1
5
+60%
7
25
×[(
3
7
-
1
14
5
6
]
(1)1.2-0.5×1.8÷0.9,
=1.2-0.5×(1.8÷0.9),
=1.2-0.5×2,
=1.2-1,
=0.2;

(2)8×7×1.25,
=(8×1.25)×7,
=10×7,
=70;

(3)
5
16
×
11
19
×3+
27
19
×
15
16

=(
5
16
×3)×
11
19
+
27
19
×
15
16

=(
11
19
+
27
19
)×
15
16

=2×
15
16

=
15
8


(4)(
3
8
-
3
8
÷
8
3
)×
16
9

=(
3
8
-
3
8
×
3
8
)×
16
9

=(1-
3
8
)×
3
8
×
16
9

=
5
8
×
2
3

=
5
12


(5)
3
5
×
8.8+0.6×
1
5
+60%,
=0.6×8.8+0.6×0.2+0.6,
=0.6×(8.8+0.2+1),
=0.6×10,
=6;

(6)
7
25
×[(
3
7
-
1
14
)×
5
6
],
=
7
25
×[
5
14
×
5
6
],
=
7
25
×
5
14
×
5
6

=
1
12
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