问题
解答题
脱式计算,能简算的要简算.
|
答案
(1)46×8-120÷15,
=368-8,
=360;
(2)[6.85-(0.65+0.7)]÷2.5,
=[6.85-0.65-0.7]÷2.5,
=[6.2-0.7]÷2.5,
=5.5÷2.5,
=2.2;
(3)
÷9+7 12
×1 9
,5 12
=
×7 12
+1 9
×1 9
,5 12
=(
+7 12
)×5 12
,1 9
=1×
,1 9
=
;1 9
(4)5.58-
+5.42-3 5
,2 5
=(5.58+5.42)-(
+3 5
),2 5
=11-1,
=10.