问题
解答题
|
答案
(1)3.5×0.8+7.5×0.8-80%,
=(3.5+7.5-1)×0.8,
=10×0.8,
=8;
(2)
÷3+1 5
×4 5
,1 3
=(
+1 5
)×4 5
,1 3
=1×
,1 3
=
;1 3
(3)20-(3.84+1.21)×0.4,
=20-5.05×0.4,
=20-2.02,
=17.98;
(4)35÷[(
-11 6
)×6].2 3
=35÷[
×6],7 6
=35÷7,
=5.