问题
解答题
简便计算. 3.72-(1.72+1.3)49×101
|
答案
(1)3.72-(1.72+1.3),
=(3.72-1.72)-1.3,
=2-1.3,
=0.7;
(2)49×101,
=49×(100+1),
=4900+49,
=4949;
(3)
-1 14
+9 10
-13 14
,1 10
=(
+1 14
)-(13 14
+9 10
),1 10
=1-1,
=0.