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nhudinh7cnc
2 năm trước
bài 1 : tính a) 3/7 + ( - 5/2 ) + ( - 3/5 ) b) - 8/18 - 15/27 c) 4/5 - (- 2/7 ) - 7/10 d) 3,5 - ( - 2/7 ) bài 2 : tính a) - 6/21 . 3/2 b) ( - 3 ) . ( - 7/12 ) c) (11/12 : 33/16 ) . 3/5 d) căn bậc 2 (-7 ) ^2 + căn bậc 2 25/16 - 3/2 e) 1/2 . căn bậc 2 100 - căn bậc 2 1/16 + 1/3 độ HỨA VOTE 5 SAO
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