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Desafío de multiplicaciones rápidas

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Desafío de multiplicaciones rápidas

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Desafío de multiplicaciones rápidas
 

Desafío de multiplicaciones rápidasOnline version

Desafío de multiplicaciones rápidas

by Yasmin Grajales
1

5421 × 21 =

2

6994 × 35 =

3

6271 × 43 =

4

5939 × 27 =

5

1536 × 56 =

6

5484 × 62 =

7

1963 × 24 =

8

1734 × 56 =

9

7165 × 21 =

10

2691 × 24 =

11

78 × 96 = ?

12

123 × 47 = ?

13

64 × 89 = ?

14

97 × 86 = ?

15

128 × 73 = ?

16

157 × 64 = ?

17

89 × 91 = ?

18

212 × 37 = ?

19

149 × 58 = ?

20

133 × 76 = ?

21

¿Cuánto es 123456 × 7890?

22

Calcula 234567 × 1023.

23

Determina 345678 × 9876.

24

Resultado de 987654 × 4321.

25

Compute 111111 × 9999.

26

¿Cuánto es 222222 × 8888?

27

Evalúa 555555 × 1234.

28

Calcular 420000 × 6789.

29

Find 999999 × 1111.

30

¿Cuánto es 314159 × 2718?

Explicación

La opción correcta es 113841.

La respuesta correcta es 244790.

Resultado correcto: 269653.

La opción correcta es 160353.

La respuesta correcta es 86016.

La opción correcta es 340008.

Resultado correcto: 47112.

La opción correcta es 97104.

La respuesta correcta es 150465.

La opción correcta es 64584.

78×96=7488. Descomponer puede ayudar en cálculos grandes.

123×47=5781. Revisa 120×50 como estimación.

64×89=5696. Redondeos pueden guiar la verificación.

97×86=8342. Descomponer: (100−3)×86.

128×73=9344. 128×70 ≈ 8960, añade 128×3.

157×64=10048. 157×8=1256;×8 luego.

89×91=8099. (90−1)×91 = 8190−91.

212×37=7844. 212×40−212×3 = 8480−636.

149×58=8642. 149×60−149×2 = 8940−298.

133×76=10108. 133×80−133×4 = 10640−532.

La opción correcta es 123456 por 7890; usa propiedad de múltiplos cercanos para verificar.

Multiplica por 1000 y añade el resultado de 23 veces 234567.

Descompón 9876 en 10000-124 y resta 124 veces 345678.

Usa descomposición 4321 = 4000+300+20+1 y suma parciales.

9999 = 10000 - 1; réstalo a 1111110000.

Descomposición en 8888 = 8000+800+80+8 y suma parciales.

Sumas parciales: 555555000 + 111111000 + 16666650 + 2222220.

6789=6000+700+80+9: sumar productos parciales.

1111 = 1000+100+10+1; sumar productos parciales.

Descomposición 2718 = 2000+700+10+8 y sumar productos parciales.

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