Toán Lớp 7: Câu 1. Tính
a) -1/39+-1/52
b)2/3+3/4.-4/9
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Toán Lớp 7: Câu 1. Tính
a) -1/39+-1/52
b)2/3+3/4.-4/9
Comments ( 2 )
b) 1/3
a) -1/39 + ( -1/52 )
= -4/156 + ( -3/156
= -7/156
= 2/3 + ( -1/3 )
= 1/3