问题
解答题
|
答案
(1)1650-480÷16×15,
=1650-30×15,
=1650-450,
=1200;
(2)0.4×7.6×25×100,
=(0.4×25)×(7.6×100),
=10×760,
=7600;
(3)(
-1 3
)×45,1 5
=
×45-1 3
×45,1 5
=15-9,
=6;
(4)20-(11.9-8.4×
),1 7
=20-(11.9-1.2),
=20-10.7,
=9.3.