Bài 1
ạ) 5/13 – 5/7 + -20/41 + 8/13 – 21/41
b) -4/11 + 5/6 – 7/11 – 5/6
Làm giúp mik v
Bài 1 ạ) 5/13 – 5/7 + -20/41 + 8/13 – 21/41 b) -4/11 + 5/6 – 7/11 – 5/6 Làm giúp mik v
By Lydia
By Lydia
Bài 1
ạ) 5/13 – 5/7 + -20/41 + 8/13 – 21/41
b) -4/11 + 5/6 – 7/11 – 5/6
Làm giúp mik v
[Hình ảnh]
a)5/13 – 5/7 + -20/41 + 8/13 – 21/41
=(5/13+8/13)+(-20/41-21/41)-5/7
=13/13-41/41-5/7
=1-1-5/7=-5/7
b)-4/11 + 5/6 – 7/11 – 5/6
=(-4/11-7/11)+(5/6-5/6)
=-1
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