题目内容

用递等式计算(能简算的要用简便方法计算).
4.32+3.2+5.68
79×101-79
132+25×8
20-
3
25
×5
(0.125×8-0.5)×4
(0.25+
5
8
)÷(
7
4
-
7
8
(1)4.32+3.2+5.68
=4.32+5.68+3.2,
=10+3.2,
=13.2;

(2)79×101-79
=(101-1)×79,
=100×79,
=7900;

(3)132+25×8
=132+200,
=332;

(4)20-
3
25
×5
=20-
3
5

=19
2
5


(5)(0.125×8-0.5)×4
=(1-0.5)×4,
=0.5×4,
=2;

(6)(0.25+
5
8
)÷(
7
4
-
7
8

=(
2
8
+
5
8
)÷(
14
8
-
7
8
),
=
7
8
÷
7
8

=1.
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