问题
解答题
|
答案
①
-(14 15
+6 15
),1 3
=
-14 15
-6 15
,1 3
=
-8 15
,5 15
=
;1 5
②
-0.81-0.19,13 5
=
-(0.81+0.19),13 5
=
-1,13 5
=
;8 5
③
+7 8
-1 8
-5 9
,4 9
=(
+7 8
)-(1 8
+5 9
),4 9
=1-1,
=0;
④5-(0.5-
),3 10
=5-0.2,
=4.8;
⑤7.68-7.68×0.5,
=7.68×(1-0.5),
=7.68×0.5,
=3.84;
⑥5.2+4.8×3.5,
=5.2+16.8,
=22.