问题
解答题
|
答案
(1)56×(
+2 7
)-22,5 8
=56×
+56×2 7
-22,5 8
=16+35-22,
=51-22,
=29;
(2)40%×38+12×
,2 5
=0.4×38+12×0.4,
=0.4×(38+12),
=0.4×50,
=20;
(3)2-
-2 9
,7 9
=2-(
+2 9
),7 9
=2-1,
=1;
(4)23000÷(125×23),
=23000÷125÷23,
=23000÷23÷125,
=1000÷125,
=8;
(5)4.55-1.8-1.2+5.45,
=(4.55+5.45)-(1.8+1.2),
=10-3,
=7;
(6)198+736+802+164,
=(198+802)+(736+164),
=1000+900,
=1900.