Question

 

47 + 47 + . . + 47	+ 33 + 33 + . . + 33
(có 67 số 47 và có 47 số 33)

Answer 1

A = 47 + 47 + 47+.....+ 47 + 33 + 33 + ....+ 33

A = (47 + 47 + 47 + ...+ 47) + ( 33 + 33 +....+33)

A = (47 \(\times\) 1 + 47 \(\times\) 1 + ....+47 \(\times\)1) + ( 33 \(\times\) 1 + 33 \(\times\) 1+...+ 33 \(\times\) 1)

A = 47 \(\times\) ( 1 + 1+...+1) + 33 \(\times\)( 1 + 1 +....+1)

A = 47 \(\times\) 67 + 33 \(\times\) 47

A = 47 \(\times\)( 67 + 33)

A = 47 \(\times\)100

A = 4700

Answer 2

47 + 47 + ...+ 47 + 33 + 33 + ... + 33

= 47 x 67 + 33 x 47

=3149+1551

=4700

Answer 3

47 + 47 + ...+ 47 + 33 + 33 + ... + 33

= 47 x 67 + 33 x 47

=3149+1551

=4700

HT

Answer 4

67 x 47 + 33 x 47 

= 47 x (67 + 33)

= 47 x 100

=4700

Answer 5

A = 47 + 47 + 47+.....+ 47 + 33 + 33 + ....+ 33

A = (47 + 47 + 47 + ...+ 47) + ( 33 + 33 +....+33)

A = (47 $\times$ 1 + 47 $\times$ 1 + ....+47 $\times$1) + ( 33 $\times$ 1 + 33 $\times$ 1+...+ 33 $\times$ 1)

A = 47 $\times$ ( 1 + 1+...+1) + 33 $\times$( 1 + 1 +....+1)

A = 47 $\times$ 67 + 33 $\times$ 47

A = 47 $\times$( 67 + 33)

A = 47 $\times$100

A = 4700

HT