Completar Frases Math WarmupVersión en línea Before we begin our lesson, lets have a little warmup! Solve these addition and subtraction problems! por Nikesha Collins 1 6 14 6 11 20 7 18 12 6 9 + 9 = 14 - 7 = 3 + 8 = 20 - 6 = 10 + 10 = 9 - 3 = 5 + 7 = 16 - 10 = 3 + 3 = 15 - 8 = 7