题目内容

脱式计算(怎样简算怎样算):
1
3
+
1
8
)×48
70.5-4.5+9.8
3
5
-
1
4
)×
3
7
7.3×99+7.3.
(1)(
1
3
+
1
8
)×48
=
1
3
×48+
1
8
×48,
=16+6,
=22;

(2)70.5-4.5+9.8
=66+9.8,
=75.8;

(3)(
3
5
-
1
4
)×
3
7

=
7
20
×
3
7

=
3
20


(4)7.3×99+7.3.
=(99+1)×7.3,
=100×7.3,
=730.
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