问题
解答题
|
答案
(1)(25+
)÷4 5 1 5
=(25+
)×54 5
=25×5+
×54 5
=125+4
=129;
(2)4÷[(
-5 9
)×4 27
]3 11
=4÷[
×11 27
]3 11
=4÷1 9
=4×9
=36;
(3)
÷[9 10
×(4 7
-3 4
)]2 5
=
÷[9 10
×4 7
]7 20
=
÷9 10 1 5
=
×59 10
=
;9 2
(4)
×13 27
+5 9
÷14 27 9 5
=
×13 27
+5 9
×14 27 5 9
=(
+13 27
)×14 27 5 9
=1×5 9
=
;5 9
(5)25×7 24
=(24+1)×7 24
=24×
+7 24 7 24
=7+7 24
=7
;7 24
(6)
×[(10 17
+2 3
)÷3 4
]5 12
=
×[10 17
×17 12
]12 5
=
×10 17 17 5
=2.