问题
填空题
(1)
=
=2×
=
(2)
=
=
=7______. |
答案
(1)
×2 7
×7,3 8
=
×7×2 7
,3 8
=2×
,3 8
=
;3 4
(2)
×9+7 10
,7 10
=
×(9+1),7 10
=
×10,7 10
=7.
故答案为:√,√.
(1)
=
=2×
=
(2)
=
=
=7______. |
(1)
×2 7
×7,3 8
=
×7×2 7
,3 8
=2×
,3 8
=
;3 4
(2)
×9+7 10
,7 10
=
×(9+1),7 10
=
×10,7 10
=7.
故答案为:√,√.