作业帮25\16÷3-1\3×.9\16简便计算
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25\16÷3-1\3×.9\16简便计算
25\16÷3-1\3×.9\16简便计算
25\16÷3-1\3×.9\16简便计算
(25/16) / 3 - (1/3) X (9/16)
= (1/3) X (25/16) - (9/16) X (1/3)
= ( 25/16 - 9/16 ) X (1/3)
= (16/16) X (1/3)
= 1/3
原式=25/16X(1/3)- 1/3x(9/16）
=(25/16-9/16)x1/3
=1x1/3
=1/3
=（25/16-9/16）×1/3
=1×1/3
=1/3