题目内容

用递等式计算:
(1)1042-384÷16×13
(2)4.1-2.56÷(0.18+0.62)
(3)
2
3
-
3
4
×
4
11
+
1
3
÷
3
7

(4)3.14×43+7.2×31.4-150×0.314.
(1)1042-384÷16×13,
=1042-24×13,
=1042-312,
=730;

(2)4.1-2.56÷(0.18+0.62),
=4.1-2.56÷0.8,
=4.1-3.2,
=0.9;

(3)
2
3
-
3
4
×
4
11
+
1
3
÷
3
7

=
2
3
-
3
11
+
1
3
×
7
3

=
2
3
-
3
11
+
7
9

=1
17
99


(4)3.14×43+7.2×31.4-150×0.314,
=3.14×43+72×3.14-15×3.14
=(43+72-15)×3.14,
=100×3.14,
=314.
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