问题 解答题
计算,能简算的要简算
1.2-0.5×1.8÷0.98×7×1.25
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
]
答案

(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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