Toán Lớp 6: tính nhanh: A) ( - 2019 ) + ( - 550 ) + ( - 451) giúp mik với

Giải đáp: ( - 2019 ) + ( - 550 ) + ( - 451) = ( - 2019 ) + ( - 451) + ( - 550) =-(2019+451)+(-550) =-(2470)+(-550) =-(2470+550) =(-3020)

(-2019)+(-550)+(-451) =-2019-(550+451) =-2019-1001 =-2019-1000-1 =-3019-1 =-3020

Toán Lớp 6: tính nhanh: A) ( - 2019 ) + ( - 550 ) + (

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