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2022-09-01 21:42:13
2020x2021-1020=4081400
2020x2022+1000=4085440
2022-09-01 21:21:46
Là 999
2022-09-01 21:20:27
Tuổi của bố là:
\(5:\dfrac{1}{8}=40\) (tuổi)
Tuổi của mẹ là:
\(5:\dfrac{1}{6}=30\) (tuổi)
Tuổi bố hơn mẹ là:
40-30=10 (tuổi)
Vậy tuổi bố hơn mẹ là 10.
2022-09-01 21:06:18
Số học sinh giỏi cả toán lẫn văn là:
30+25-45=10 (học sinh)
Vậy số hs giỏi cả toán lẫn văn là 20