问题
解答题
脱式计算.(能简算的要简算)
|
答案
(1)
×3 4
-14 15
÷3 4
,15 2
=
×3 4
-14 15
×3 4
,2 15
=
×(3 4
-14 15
),2 15
=
×3 4
,12 15
=
;3 5
(2)16×(
+1 8
-1 4
),3 16
=16×
+16×1 8
-16×1 4
,3 16
=2+4-3,
=3;
(3)
÷1 3
×5 6
÷9 28
,1 14
=
×1 3
×6 5
×14,9 28
=(
×1 3
)×(6 5
×14),9 28
=
×2 5
,9 2
=
;9 5
(4)
÷(3 5
-3 4
)×2 3
,5 6
=
÷3 5
×1 12
,5 6
=
×36 5
,5 6
=6.