Toán Lớp 6: ab+bc chia hết cho 11 nhanh lên mik cần gấp lắm
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Toán Lớp 6: ab+bc chia hết cho 11 nhanh lên mik cần gấp lắm
Comments ( 1 )
a.10+b.1+b.10+a.1
(a.10+a.1)+(b.1+b.10)
a.11+b.11
11.(a+b)chia hết cho 11