问题
解答题
|
答案
(1)
×4 7
×21 10
=2 5
;12 25
(2)
÷4 9
×5 6 5 8
=
×4 9
×6 5 5 8
=
;1 3
(3)
÷25÷2 3 4 5
=
×2 3
×1 25 5 4
=
;1 30
(4)
×12 13
÷1 4 9 16
=
×12 13
×1 4 16 9
=
.16 39
|
(1)
×4 7
×21 10
=2 5
;12 25
(2)
÷4 9
×5 6 5 8
=
×4 9
×6 5 5 8
=
;1 3
(3)
÷25÷2 3 4 5
=
×2 3
×1 25 5 4
=
;1 30
(4)
×12 13
÷1 4 9 16
=
×12 13
×1 4 16 9
=
.16 39