四分之三加九又四分之三加九十九又四分之三加九百九十九又四分之三等于多少,四种方法
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3/4 + 9+3/4 + 99+3/4 + 999+3/4
=3/4 + 10-1/4 + 100-1/4 + 1000-1/4
=1110
=1-1/4 + 10-1/4 + 100-1/4 + 1000-1/4
=1111-4*1/4
=1110
3/4 + 9+3/4 + 99+3/4 + 999+3/4
=4*3/4 + 9+ 99+ 999
=3+ 9+ 99+ 999
=1+ 9+1+ 99 +1+ 999
=1110
3/4 + 9+3/4 + 99+3/4 + 999+3/4
=4*3/4 + 10-1+ 100-1+ 1000-1
=3+1110-3
=1110
=3/4 + 10-1/4 + 100-1/4 + 1000-1/4
=1110
=1-1/4 + 10-1/4 + 100-1/4 + 1000-1/4
=1111-4*1/4
=1110
3/4 + 9+3/4 + 99+3/4 + 999+3/4
=4*3/4 + 9+ 99+ 999
=3+ 9+ 99+ 999
=1+ 9+1+ 99 +1+ 999
=1110
3/4 + 9+3/4 + 99+3/4 + 999+3/4
=4*3/4 + 10-1+ 100-1+ 1000-1
=3+1110-3
=1110
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