Toán Lớp 7: |-5,7|+2,8+|11,5|-|5,7|-|-2,8|
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Toán Lớp 7: |-5,7|+2,8+|11,5|-|5,7|-|-2,8|
Comments ( 2 )
=5,7+2,8+11,5-5,7-2,8
=(5,7-5,7)+(2,8-2,8)+11,5
=0+0+11,5
=11,5
Giải thích:
{:(|a|=a\quad\text{nếu a}ge0),(|a|=-a\quad\text{nếu a<0}):}