问题
解答题
能简算的要简便算.
|
答案
(1)
×21×2 15
,5 14
=
×42 15
,5 14
=1;
(2)15×(
+2 3
),3 5
=15×
+2 3
×15,3 5
=10+9,
=19;
(3)97×
,5 96
=(96+1)×
,5 96
=96×
+1×5 96
,5 96
=5
;5 96
(4)(
+1 3
+1 4
)×24,1 24
=24×
+24×1 3
+1 4
×24,1 24
=8+6+1,
=15;
(5)
×3 5
+2 3
÷12 5
,1 2
=
+2 5
×2 5
,2 3
=
+2 5
,4 15
=
+6 15
,4 15
=
;2 3
(6)[1-(
+1 4
)]÷3 8
,1 4
=[1-
]×4,5 8
=
×4,3 8
=1.5;