Câu hỏi của Nguyễn thị lan phương

2:\(=375:\left\{32-4-\left(5\cdot9-42\right)\right\}-14\)\(=\dfrac{375}{28-45+42}-14=\dfrac{375}{25}-14=15-14=1\)3: \(=98-210:\left[16+3\cdot\left(6+3\cdot4\right)\right]\)\(=98-\dfrac{210}{16+3\cdot18}=98-\dfrac{210}{70}=98-3=95\)4: \(=1523-\left\{5\cdot\left[409-3^2\right]-1724\right\}\)\(=1523-5\cdot400+1724=3247-2000=1247\) Câu trả lời: 2:\(=375:\left\{32-4-\left(5\cdot9-42\right)\right\}-14\)\(=\dfrac{375}{28-45+42}-14=\dfrac{375}{25}-14=15-14=1\)3: \(=98-210:\left[16+3\cdot\left(6+3\cdot4\right)\right]\)\(=98-\dfrac{210}{16+3\cdot18}=98-\dfrac{210}{70}=98-3=95\)4: \(=1523-\left\{5\cdot\left[409-3^2\right]-1724\right\}\)\(=1523-5\cdot400+1724=3247-2000=1247\)