问题
解答题
怎样简便怎样算 2.65×101 (2.4×
999
|
答案
(1)2.65×101,
=2.65×100+2.65,
=265+2.65,
=267.65;
(2)(2.4×
+3.6÷5 8
)×3 4
,12 7
=(1.5+3.6×
)×4 3
,12 7
=(1.5+4.8)×
,12 7
=6.3×
,12 7
=10.8;
(3)
×5 8
+11 10
÷3 8
,10 11
=(
+5 8
)×3 8
,11 10
=1×
,11 10
=1
;1 10
(4)999
+998 9
+98 9
+8 9
,1 3
=(999
+8 9
)+(991 9
+8 9
)+(91 9
+8 9
),1 9
=1000+100+10,
=1110.