题目内容

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
(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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