问题
解答题
脱式计算 275+25÷5-100 76×1.04+1.04×25-1.04 (
0.75×
|
答案
(1)275+25÷5-100,
=275+5-100,
=280-100,
=180;
(2)76×1.04+1.04×25-1.04,
=(76+25-1)×1.04,
=100×1.04,
=104;
(3)(
-7 12
)×24-3 8
,5 9
=
×24-7 12
×24-3 8
,5 9
=14-9-
,5 9
=5-
,5 9
=4
;4 9
(4)0.75×
+5 9
×3 4
,4 9
=
×(3 4
+5 9
),4 9
=
×1,3 4
=
.3 4