问题
解答题
用递等式计算.(你认为怎样简便就怎样算) 95.4×83+19×95
24×(
|
答案
(1)95.4×83+19×95
-95.4×22 5
=95.4×83+19×95.4-95.4×2,
=(83+19-2)×95.4,
=100×95.4,
=9540;
(2)5
-13 29
-8 11
-2 11
+1 11 16 29
=(5
+13 29
)-(16 29
+8 11
+2 11
),1 11
=6-1,
=5;
(3)24×(
+1 12
-3 8
)1 6
=24×
+24×1 12
-24×3 8
,1 6
=2+9-4,
=7;
(4)1110÷[56×(
-3 7
)]3 8
=1110÷[56×
-56×3 7
],3 8
=1110÷3,
=370.