问题
解答题
|
答案
(1)33.5-5.3-4.7+16.5,
=(33.5+16.5)-(5.3+4.7),
=50-10,
=40;
(2)9900÷25÷4,
=9900÷(25×4),
=9900÷100,
=99;
(3)1÷(
+3 5
),3 10
=1÷
,9 10
=
;10 9
(4)24×(
+2 3
-1 6
),3 8
=24×
+24×2 3
-24×1 6
,3 8
=16+4-9,
=20-9,
=11;
(5)1+0.45÷0.9-
,7 8
=1+0.5-
,7 8
=1.5-
,7 8
=0.625;
(6)
-(20 17
+3 17
),2 3
=
-20 17
-3 17
,2 3
=1-
,2 3
=
.1 3