问题
解答题
9
|
答案
9
×8+ 87 8
×7+76 7
×6+65 6
×54 5
=(9+
)×8+(8+7 8
)×7+(7+6 7
)×6+(6+5 6
)×54 5
=72+7+56+6+42+5+30+4
=222.
9
|
9
×8+ 87 8
×7+76 7
×6+65 6
×54 5
=(9+
)×8+(8+7 8
)×7+(7+6 7
)×6+(6+5 6
)×54 5
=72+7+56+6+42+5+30+4
=222.