3 = operaciones con potencias del mismo exponente

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2º ESO - Matemáticas - SM - 2 POTENCIAS Y RAÍCES CUADRADAS - 3 = Operaciones con potencias del mismo exponente 1/2 15. a) ( = × × = × × 3 3 3 3 5 2 4 5 2 4 3 40 d) ( ( ( ( [ ] = - × - = - × - 123 123 123 6 18 6 18 123 108 b) ( = = 8 8 8 3 : 6 3 : 6 8 2 e) ( ( ( ( [ ] = × - × - = × - × - 5 5 5 5 3 6 2 3 6 2 5 36 c) ( ( [ ] = - × = - × 7 7 7 4 2 4 2 ( 7 8 - f) ( ( ( ( [ ] = - × - = - × - 4 4 4 4 12 : 3 8 12 : 3 8 4 2 16. a) (- 12) 3 : 2 3 = (- 6) 3 b) (-2) 4 × 3 4 × (- 5) 4 = 30 4 c) 5 7 × (-2) 7 : (-1) 7 = 10 7 d) (2 × 5) 5 = 2 5 × 5 2 = 32 × 25 = 800 e) ( 20 : 2 ) 3 = 20 3 : 2 3 = 8000 : 8 = 1000 17. a) ( ( ( ( ( = × = × = × = × 4 4 4 4 4 4 4 4 4 2 3 2 3 6 : 12 8 : 24 6 : 12 8 : 24 4 6 = 296 . 1 b) ( [ ] ( [ ] ( [ ] ( [ ] ( [ ] = - - = - × - = - × - 3 3 3 3 3 3 3 6 : 30 3 : 18 : 15 2 3 : 18 : 15 2 3 5 = 125 c) ( ( ( [ ] ( = × = × = - × - × 4 4 4 4 4 4 4 5 2 5 2 5 1 5 : 10 4 10 = 000 . 10 d) ( [ ] ( [ ] [ ] [ ] ( ( [ ] = - - = - - = - - 5 5 5 5 5 8 : 4 8 : 4 2 : 16 : 5 : 20 ( 5 2 1 = 03125 , 0 18. a) ( = × = 6 6 7 5 35 6 9 7 5 × b) ( ( = × = = - 6 6 6 9 2 18 18 6 6 9 2 × c) ( ( = × = = - 10 10 10 7 3 21 21 10 10 7 3 × d) = = + 6 6 12 5 5 6 6 5 5 × e) ( = = = - + 3 3 6 6 3 3 3 3 3 3 3 × f) ( = = = - + 2 2 4 4 8 8 8 2 2 8 8 × 19. a) ( = × × = - ÷ × - 125 27 64 27 64 125 3 3 3 5 4 3 × × = = 3 60 000 . 216 b) Con el enunciado dado, no se puede escribir cociente de potencias de igual exponente. Alternativa: ( = = - - 8 : 1000 8 : 1000 3 3 2 : 10 ( = = = 3 3 5 2 : 10 125 20 a) ( ( = = = × = × -2 4 2 4 2 4 2 4 4 12 12 : 12 12 : 4 3 12 : 4 3 2 12 = 144 b) ( ( ( ( = = = × + 5 5 5 3 2 5 5 3 2 2 : 2 5 : 10 : 2 5 : 10 : 2 2 0 2 = 1 c) ( [ ] ( ( ( ( ( = - = - = - × × - = - × × - + 8 3 5 3 5 3 5 5 15 15 15 3 5 15 3 5 8 15 = 625 . 890 . 562 . 2 d) ( 29 ( 29 [ ] ( 29 [ ] ( 29 ( 29 ( 29 ( 29 ( 29 = = - - = - - = - - - - 4 4 4 4 3 7 2 2 3 7 2 : 8 2 : 8 2 : 8 2 : 8 : 8 4 4 = 256

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Resolución de actividades propuestas en2º ESO, Matemáticas, SM, Unidad 2 = Potencias y raíces cuadradas, Unidad 3 - Operaciones con potencias del mismo exponente

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Page 1: 3 = Operaciones con potencias del mismo exponente

2º ESO - Matemáticas - SM - 2 ≡ POTENCIAS Y RAÍCES CUADRADAS - 3 = Operaciones con potencias del mismo exponente

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15. a) ( ) =××=×× 3333 524524 340 d) ( ) ( ) ( ) ( )[ ] =−×−=−×− 123123123 618618 123108

b) ( ) == 888 3:63:6 82 e) ( ) ( ) ( ) ( )[ ] =×−×−=×−×− 5555 362362 536

c) ( ) ( )[ ] =−×=−× 777 4242 ( )78− f) ( ) ( ) ( ) ( )[ ] =−×−=−×− 4444 12:3812:38 42 16. a) (- 12) 3 : 2 3 = (- 6) 3 b) (-2) 4 × 3 4 × (- 5) 4 = 30 4

c) 5 7 × (-2) 7 : (-1) 7 = 10 7 d) (2 × 5) 5 = 2 5 × 5 2 = 32 × 25 = 800

e) ( 20 : 2 ) 3 = 20 3 : 2 3 = 8000 : 8 = 1000 17. a) ( ) ( ) ( ) ( ) ( ) =×=×=×=× 444444444 23236:128:246:128:24 46 = 296.1

b) ( )[ ] ( )[ ] ( )[ ] ( )[ ] ( )[ ] =−−=−×−=−×− 3333333 6:303:18:1523:18:152 35 = 125

c) ( ) ( ) ( )[ ] ( ) =×=×=−×−× 4444444 5252515:10 410 = 000.10

d) ( )[ ] ( )[ ] [ ] [ ] ( ) ( )[ ] =−−=−−=−− 55555 8:48:42:16:5:20 ( )521 = 03125,0 18. a) ( ) =×= 66 7535 69 75 × b) ( ) ( ) =×==− 666 921818 66 92 ×

c) ( ) ( ) =×==− 101010 732121 1010 73 × d) == +6612 55 66 55 ×

e) ( ) ===− +3366 333 33 33 × f) ( ) ===− +2244 888 22 88 × 19. a) ( ) =××=−÷×− 12527642764125 333 543 ×× == 360 000.216

b) Con el enunciado dado, no se puede escribir cociente de potencias de igual exponente.

Alternativa: ( ) ==−− 8:10008:1000 33 2:10 ( ) === 33 52:10 125 20 a) ( ) ( ) ===×=× −242424244 1212:1212:4312:43 212 = 144

b) ( ) ( ) ( ) ( ) ===× + 555325532 2:25:10:25:10:22 02 = 1

c) ( )[ ] ( ) ( ) ( ) ( ) ( ) =−=−=−××−=−××− + 83535355 151515351535 815 = 625.890.562.2 d) ( ) ( )[ ] ( )[ ] ( ) ( ) ( ) ( ) ( ) ==−−=−−=−−− − 4444372237 2:82:82:82:8:8 44 = 256

Page 2: 3 = Operaciones con potencias del mismo exponente

2º ESO - Matemáticas - SM - 2 ≡ POTENCIAS Y RAÍCES CUADRADAS - 3 = Operaciones con potencias del mismo exponente

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21. a) ( ) ( ) ( ) ( ) ( ) ( ) =−=−=−×=−−×− −36363666 1010:1010:521000:25 310− = 000.1−

b) ( )[ ] ( )[ ] ( ) ( ) ( )[ ] ( ) ( ) ( ) =−=−×−=−×−×−=−××− + 832332333 222222246:12 82 = 256

c) ( )[ ] ( )[ ] ( ) ( )[ ] ( ) ( ) =−=−−×=×−− + 99453334533 2:22:5:5222:5:1000 02− = 1−

d) ( )[ ] ( ) ( ) ( ) =−=−××=−×−××− ++×× 3126362233623 22222442 212− = 152.097.2− 22. a) 328 ≡ 33 32216 ×≡ ⇒ Nº caramelos = ( ) =×× 333 322 312 = 36 32 × = 728.1

b) 3327 ≡ ⇒ Reparto individual = =× 336 3:32 62 = 64 23. a) ( ) ( ) ( ) =×=×=×=× 552525105 169494949 5144

b) ( ) == 434124 2:812:81 ( )48:81

c) ( ) ( ) =×=×=×=× × 1212341234123 525252516 1210

d) ( ) ( ) ( )[ ] [ ] =×=×=××=× +× 888232882238228 2:522:5222:5228:10 85

e) ( ) ( ) ( ) =×=×=×=××=× 44248422242284 94343425:53425:320 436

f) ( ) ( ) ( ) ( ) ( ) =×=×=×=−×− 333233233323 12:4612:2612:2612:86 32 24. a) ( ) ( ) ( ) ( ) =×=×=××=+× −×−× 06632634634263 525252:2519:1625 62

b) ( ) ( ) ( ) ( ) ( ) =×=×=×=××=−×− −+ 32363363363323 3232322:2328:26:36 312

c) ( )[ ] ( ) ( )[ ] ( ) ( ) =×=×=××=−×− −××−×× 125235223252232325233 525252:5220:54 120

d) ( ) ( ) ( ) ( ) =×=×=××=×× ×−×−× 0553535525353255 323232:3269:618 52