问题
解答题
51
|
答案
51
÷2 3
+715 3
÷3 4
+917 4
÷4 5 9 5
=(50+
)×5 3
+(70+3 5
)×7 4
+(90+4 7
)×9 5 5 9
=50×
+3 5
×5 3
+70×3 5
+4 7
×7 4
+90×4 7
+5 9
×9 5 5 9
=30+1+40+1+50+1
=123.
51
|
51
÷2 3
+715 3
÷3 4
+917 4
÷4 5 9 5
=(50+
)×5 3
+(70+3 5
)×7 4
+(90+4 7
)×9 5 5 9
=50×
+3 5
×5 3
+70×3 5
+4 7
×7 4
+90×4 7
+5 9
×9 5 5 9
=30+1+40+1+50+1
=123.