Toán Lớp 6: Tính T = (–9) + (–2)

T = (-9) + (-2) - (-3) + (-8) + 9 T = (-9) + (-2) + 3 + (-8) + 9 T = (9 - 9) + [(-2) + (-8)] + 3 T = 0 + (-10) + 3 T = (-10) + 3 T = -7

(–9) + (–2) – (–3) + (–8) + 9 = -9-2+3-8+9 = -9+9-2-8+3 = 0-2-8+3 = 0-10+3 = -7 Vậy T = -7

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Toán Lớp 6: Tính T = (–9) + (–2) – (–3) + (–8) + 9