问题
解答题
直接写出得数
|
答案
(1)5.17+1.96+4.83,
=(5.17+4.83)+1.96,
=10+1.96,
=11.96;
(2)12.5×0.34×8,
=12.5×8×0.34,
=100×0.34,
=34;
(3)5.01×101-5.01,
=5.01×(101-1),
=5.01×100,
=501;
(4)﹙
-7 12
)×1 3
,2 7
=
×1 4
,2 7
=
;1 14
(5)5×(
-1 5
)×6,1 6
=(5×6)×(
-1 5
),1 6
=5×6×
-5×6×1 5
,1 6
=5×
×6-6×1 5
×5,1 6
=1×6-1×5,
=6-5,
=1.