题目内容

用递等式计算下列各题,能简算的要简算
5
6
×0.25+
1
4
×
1
6

(
3
4
+
11
6
-
13
24
)×12

3
3
4
×8-3
3
4
+3×7.5

863+47.95÷0.35-529.
(1)
5
6
×0.25+
1
4
×
1
6

=
5
6
×
1
4
+
1
4
×
1
6

=(
5
6
+
1
6
)×
1
4

=1×
1
4

=
1
4


(2)(
3
4
+
11
6
-
13
24
)×12,
=
3
4
×12+
11
6
×12-
13
24
×12,
=9+22-6.5,
=24.5;

(3)3
3
4
×8-3
3
4
+3×7.5,
=3.75×8-3.75+3×7.5,
=3.75×(8-1)+3×7.5,
=3.75×7+3×7.5,
=26.25+22.5,
=48.75;

(4)863+47.95÷0.35-529,
=863+137-529,
=1000-529,
=471.
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