问题
解答题
下面各题怎样算简便就怎样算.
|
答案
(1)36×
×2 7
×425 72
=(36×
)×(5 72
×42)2 7
=
×125 2
=30;
(2)(
+7 8
)÷7 16 7 16
=
×7 8
+16 7
×7 16 16 7
=2+1
=3;
(3)
×6 7
+3 4
×1 4 6 7
=
×(6 7
+3 4
)1 4
=
×16 7
=
;6 7
(4)
÷7 8
÷2 3 7 8
=
÷7 8
÷7 8 2 3
=1÷2 3
=1
;1 2
(5)
×8÷5 9 7 9
=
÷40 9 7 9
=40 7
=5
;5 7
(6)24×(
+1 3
+3 8
)7 12
=24×
+24×1 3
+24×3 8 7 12
=8+9+14
=31.