Lớp 9 - Kiểm tra tháng 4

[{"a":12,"b":5},[3,6],{"a":5,"b":1,"c":-34,"rnd":3},{"ty":4,"d":24,"r":21,"d1":4,"r1":3},[-1,1,4,2],{"w":[-3,6,7],"t":5},[-1,-5,-6],{"c":1,"d":"cm","a":12,"b":18},{"c":11,"a":1,"b":"viên đá","d":12.3},{"c":0,"d":"dm","a":16,"b":18}]

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