问题
解答题
怎样算便怎样算:
|
答案
(1)
÷7 9
+11 5
×2 9 5 11
=
×7 9
+5 11
×2 9 5 11
=(
+7 9
)×2 9 5 11
=1×5 11
=
;5 11
(2)
÷(2 5
+3 4
)2 5
=
÷2 5 23 20
=
×2 5 20 23
=
;8 23
(3)(
+1 8
)×41 4
=
×4+1 8
×41 4
=
+11 2
=1
;1 2
(4)
×7 8
÷5 7
×7 8 5 7
=
×7 8
×5 7
×8 7 5 7
=(
×7 8
)×(8 7
×5 7
)5 7
=1×25 49
=
;25 49
(5)(
+7 8
)÷13 16 13 16
=
×27 16 16 13
=
;27 13
(6)2008×2006 2007
=(2007+1)×2006 2007
=2007×
+2006 2007 2006 2007
=2006+2006 2007
=2006
;2006 2007
(7)
+(2 3
+4 7
)×1 2 7 25
=
+2 3
×15 14 7 25
=
+2 3 3 10
=
.29 30