问题
解答题
|
答案
(1)
×14+7 15 7 15
=
×(14+1)7 15
=
×157 15
=7;
(2)(
+7 12
)÷1 24 1 2
=
×2+7 12
×21 24
=
+7 6 1 12
=1
;1 4
(3)
×14×9 28 4 9
=
×9 28
×144 9
=
×141 7
=2;
(4)12÷
×5 6 5 12
=12×
÷5 12 5 6
=5÷5 6
=6;
(5)
÷14 5
÷2 5 1 7
=
÷(14 5
×2 5
)1 7
=
÷14 5 2 35
=49;
(6)
÷1 4
×5 6 5 12
=
×3 10 5 12
=
;1 8
(7)(
+5 14
)÷5 7 6 7
=
÷15 14 6 7
=1
;1 4
(8)
×(1 3
-4 5
)5 7
=
×1 3 3 35
=
.1 35