Giải đáp: Lời giải và giải thích chi tiết: 2001 – ( 53 + 1579 ) – ( -53 ) = 2001 – 53 – 1579 + 53 = 2000 + 1 – 1500 – 79 = 500 – 79 + 1 = 421 + 1 = 422 35 – 17 + 2017 – 35 + ( -2017 ) = ( 35 – 35 ) – 17 + [ 2017 + ( -2017 )] = 0 – 17 + 0 = -17 37 + (-17) – 37 + 77 = ( 37 – 37 ) + ( -17 + 77 ) = 0 + 60 = 60 Trả lời
$\text{a/ 2001 – (53 + 1579) – (-53)}$ $\\$ $\text{= 2001 – 53 – 1579 + 53}$ $\\$ $\text{= (2001 – 1579) + (-53 + 53)}$ $\\$ $\text{= 422}$ $\\$ $\text{b/ 35 – 17 + 2017 – 35 + (-2017)}$ $\\$ $\text{35 – 17 + 2017 – 35 – 2017}$ $\\$ $\text{= (35 – 35) + (2017 – 2017) – 17}$ $\\$ $\text{= -17}$ $\\$ $\text{c/ 37 + (-17) – 37 + 77}$ $\\$ $\text{= 37 – 17 – 37 + 77}$ $\\$ $\text{= (37 – 37) + (-17 + 77)}$ $\\$ $\text{= 60}$ Trả lời
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