问题
解答题
|
答案
①
×4 15
=3 8
;1 10
②36÷
=36×4 17
=153;17 4
③
×12 13
=7 24
;7 26
④
×4 7
+5 9
×3 7
,5 9
=(
+4 7
)×3 7
,5 9
=1×
,5 9
=
;5 9
⑤(
+1 5
)×15,2 3
=
×15+1 5
×15,2 3
=3+10,
=13;
⑥18÷
÷3 5
,2 3
=18×
×5 3
,3 2
=45;
⑦2-
÷6 13
-9 26
,2 3
=2-
×6 13
-26 9
,2 3
=2-
-4 3
,2 3
=2-(
+4 3
),2 3
=2-2,
=0;
⑧[1-(
+1 4
)]÷3 8
,1 4
=[1-
]÷5 8
,1 4
=
×4,3 8
=
.3 2