问题
解答题
|
答案
(1)(
+4 7
)×140,21 10
=
×140+4 7
×140,21 10
=80+294,
=374;
(2)
÷5 8
÷7 12
,7 10
=
×5 8
×12 7
,10 7
=
;75 49
(3)15÷
×9 10
,3 5
=15×
×10 9
,3 5
=10.
|
(1)(
+4 7
)×140,21 10
=
×140+4 7
×140,21 10
=80+294,
=374;
(2)
÷5 8
÷7 12
,7 10
=
×5 8
×12 7
,10 7
=
;75 49
(3)15÷
×9 10
,3 5
=15×
×10 9
,3 5
=10.