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1. - 2, 3, - 4, 5, - 6, 7, - 8 what is the number 2004? What is the number 2005?
The number of 2004 is - 2004
The number of 2005 is 2005
41 and one-third × & # 190; + 31 and# 188; × four fifths + 13 and one-fifth × five sixths
Simple calculation
41 and 1 / 3 × 3 / 4 + 51 and 1 / 4 × 4 / 5 =?
72
(1 / 51 + 1 / 42) × 17 × 14=
process
（1/51+1/42）*17*14
=1/51*17*14+1/42*14*17
=14/3+17/3
=31/3
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