# Toán Lớp 6: Tính hợp lí nhất: – ( 52 – 16 – 34 ) + ( 52 – 34 ) – 2003 + ( – 21 + 75 + 2003 ) – ( – 21 – 25 + 239 )

Toán Lớp 6: Tính hợp lí nhất:
– ( 52 – 16 – 34 ) + ( 52 – 34 )
– 2003 + ( – 21 + 75 + 2003 ) – ( – 21 – 25 + 239 )

### 16 bình luận về “Toán Lớp 6: Tính hợp lí nhất: – ( 52 – 16 – 34 ) + ( 52 – 34 ) – 2003 + ( – 21 + 75 + 2003 ) – ( – 21 – 25 + 239 )”

1. – ( 52 – 16 – 34 ) + ( 52 – 34 )
= – 52 + 16 + 34 + 52 – 34
= ( 52 – 52 ) + ( 34 – 34 ) + 16
= 0 + 0 + 16
= 16
– 2003 + ( – 21 + 75 + 2003 ) – ( – 21 – 25 + 239 )
= – 2003 – 21 + 75 + 2003 + 21 + 25 – 239
= ( 2003 – 2003 ) + ( 21 – 21 ) + ( 75 + 25 ) – 239
= 0 + 0 + 100 – 239
= – 139

Trả lời
2. =-52+16+34+52-34
=(-52+52)+(-34+34)+16=16
_____________
-2003-21+75+2003+21+25-239
=100-239=-139

Trả lời
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