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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 6: Cho hai số: A=2019×2020+2021 B=2021×2020-2019 Không tính kết quả hãy so sánh A với B

Toán Lớp 6: Cho hai số:
A=2019×2020+2021
B=2021×2020-2019
Không tính kết quả hãy so sánh A với B

Comments ( 1 )

  1. A=2019×2020+2021
    A=2019×2020+2020+1
    A=(2019+1)×2020+1
    A=2020×2020+1
    B=2021×2020-2019
    B=2021×2020-2020+1
    B=(2021-1)×2020+1
    B=2020×2020+1
    có 2020×2020+1=2020×2020+1
    =>A=B

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222-9+11+12:2*14+14 = ? ( )

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