问题
解答题
|
答案
(1)8.88×12.5,
=(8+0.8+0.08)×12.5,
=8×12.5+0.8×12.5+0.08×12.5,
=100+10+1,
=111;
(2)
÷9 32
+5 2
×3 5
,9 32
=(
+2 5
)×3 5
,9 32
=1×
,9 32
=
;9 32
(3)(
+2.4×3 5
)×1 3
,1 7
=(
+3 5
)×4 5
,1 7
=
×7 5
,1 7
=
;1 5
(4)2011×
,2009 2010
=(2010+1)×
,2009 2010
=2010×
+1×2009 2010
,2009 2010
=2009+
,2009 2010
=2009
.2009 2010