Toán Lớp 6: -(-2019 + 3789) + (2789 – 2019)
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Toán Lớp 6: -(-2019 + 3789) + (2789 – 2019)
Tính nhanh ạ
Comments ( 2 )
-(-2019+3789)+(2789-2019)
= -(-2019)-3789+2789-2019
= 2019-3789+2789-2019
= (2019-2019)+(2789-3789)
= 0+(-1000)
= -1000
@hieu
Giải đáp:
-(-2019+3789)+(2789-2019)
=2019-3789+2789-2019
=(2019-2019)+(-3789+2789)
=-1000