问题
解答题
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答案
=3 9
=3÷3 9÷3
; 1 3
=12 18
=12÷6 18÷6
; 2 3
=21 35
=21÷7 35÷7
;3 5
=15 20
=15÷5 20÷5
; 3 4
=30 45
=30÷15 45÷15
; 2 3
=28 98
=28÷14 98÷14
.2 7