Toán Lớp 6: 2001 – (53 + 1579) – (-53) 35 – 17 + 2017 – 35 + (-2017) 37 + (-17) – 37 + 77

$\text{a/ 2001 – (53 + 1579) – (-53)}$ $\\$ $\text{= 2001 – 53 – 1579 + 53}$ $\\$ $\text{= (2001 – 1579) + (-53 + 53)}$ $\\$ $\text{= 422}$ $\\$ $\text{b/ 35 – 17 + 2017 – 35 + (-2017)}$ $\\$ $\text{35 – 17 + 2017 – 35 – 2017}$ $\\$ $\text{= (35 – 35) + (2017 – 2017) – 17}$ $\\$ $\text{= -17}$ $\\$ $\text{c/ 37 + (-17) – 37 + 77}$ $\\$ $\text{= 37 – 17 – 37 + 77}$ $\\$ $\text{= (37 – 37) + (-17 + 77)}$ $\\$ $\text{= 60}$