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8.- Sumas y restas de números enteros combinadas
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8.- Sumas y restas de números enteros combinadas

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Matemáticas 1º ESO

Matemáticas 1º ESO

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  • 1. SESO DEL IES LAS CUMBRES. GRAZALEMA MATEMÁTICAS 1º ESOhttp://iesgrazalema.blogspot.com8.- SUMAS Y RESTAS DE NÚMEROS ENTEROS COMBINADAS Ejemplo −2−−57 → Quitando paréntesis −2−−57=−257=12−2=10 Calculadora: fx-82SX fx-82MS Qalculate! WIRIS ( – 2 ) - ( – 5 ) + ( +7 ) = WIRIS Operaciones  – 2 -  – 5 +  +7 = Ejemplo −32−1−5−17 1 → Operando dentro de los paréntesis −32−1−5−17=−5−17−6=− 41=−41=−3 2 → Quitando paréntesis −32−1−5−17=−3−21−5−17=8−11=−3 Calculadora: fx-82SX fx-82MS Qalculate! WIRIS - ( 3+2–1 ) + ( –5–1+7 ) = WIRIS Operaciones -  3 + 2 – 1 +  – 5 – 1 + 7 = Ejemplo −[−32−5][−2−−3−5]−2 1 → Operando dentro de los paréntesis y de los corchetes −[−32−5][−2−−3−5]−2=−[−5−5][−2−−8]−2 = =−−5−5−28−2=−−106−2=106−2=16−2=14 1
  • 2. 2 → Quitando corchetes y paréntesis −[−32−5][−2−−3−5]−2=325−2−−3−5−2=325−235−2 = = 18−4=14 Calculadora: fx-82SX fx-82MS Qalculate! WIRIS - ( - ( 3+2 ) –5 ) + ( –2 - ( –3–5 ) ) –2 = WIRIS Operaciones -  -  3 + 2 - 5 +  – 2 -  – 3 – 5 - =Ejercicio propuesto 23, 24, 25, 26 → Ejercicio resuelto 23, 24, 25, 26 2