问题
解答题
计算. (1)(
(2)
(3)(1.6÷0.32)÷(3.5-2.25) (4)
|
答案
(1)(
+1 5
)×5×7,2 7
=
×5×7,17 35
=
×7,17 7
=17;
(2)
×97-6×19 91
,19 97
=
-1843 91
,114 97
=20
;1857 8827
(3)(1.6÷0.32)÷(3.5-2.25),
=5÷1.25,
=4;
(4)
×[(5 4
+1 5
)×1 3
],3 2
=
×[5 4
×8 15
],3 2
=
×5 4
,4 5
=1.