问题 解答题
简便运算
4
7
÷
11
5
+
3
7
×
5
11
16×2.28×125247.6-(147.6+67.89)
5
8
+
1
17
)×8+
9
17
答案

(1)

4
7
÷
11
5
+
3
7
×
5
11

=

4
7
×
5
11
+
3
7
×
5
11

=(

4
7
+
3
7
)×
5
11

=1×

5
11

=

5
11

(2)16×2.28×125,

=2×8×2.28×125,

=(2×2.28)×(125×8),

=4.56×1000,

=4560;

(3)247.6-(147.6+67.89),

=247.6-147.6-67.89,

=100-67.89,

=32.11;

(4)(

5
8
+
1
17
)×8+
9
17

=

5
8
×8+
1
17
×8+
9
17

=5+

8
17
+
9
17

=5+(

8
17
+
9
17
),

=5+1,

=6.

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