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脱式计算,你喜欢怎样算就怎样算512-144÷931.9×18-80×3.1918+211+8.875+91149×[34-(716-34)].

题目详情
脱式计算,你喜欢怎样算就怎样算
512-144÷9                                     
31.9×18-80×3.19
1
8
+
2
11
+8.875+
9
11

4
9
×[
3
4
-(
7
16
-
3
4
)].
▼优质解答
答案和解析
(1)512-144÷9
=512-16
=496;
(2)31.9×18-80×3.19
=31.9×18-8×31.9
=31.9×(18-8)
=31.9×10
=319;
(3)
1
8
+
2
11
+8.875+
9
11

=(
1
8
+8.875)+(
2
11
+
9
11

=9+1
=10;
(4)
4
9
×[
3
4
-(
7
16
-
3
4
)]
=
4
9
×[
3
4
-
7
16
+
3
4
]
=
4
9
×[
3
4
+
3
4
-
7
16
]
=
4
9
×[
3
2
-
7
16
]
=
4
9
×
17
16

=
17
36
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