问题
解答题
|
答案
(1)16×125,
=2×8×125,
=2×(8×125),
=2×1000,
=2000;
(2)
×1 3
÷1 9
×1 3
,1 9
=
×1 3
×3×1 9
,1 9
=
;1 81
(3)7.54-(2.54+3.12),
=7.54-2.54-3.12,
=5-3.12,
=1.88;
(4)
÷[(4 15
-5 7
)÷3 14
],3 4
=
÷[4 15
×1 2
],4 3
=
÷4 15
,2 3
=
×4 15
,3 2
=
.2 5