Question

tính nhanh:

215x45+50x217+207x5

Answer 1

  $217\times 45+50\times 217+207\times 5$

$=217\times (45+50)+207\times 5$

$=217\times 95+207\times 5$

$=20615+1035$

$=21650$

Answer 2

217 x 45 + 50 x 217 + 207 x 5
= 217 x (45+50) + 207x5
= 217 x 95 + 207x5
= 20615 + 1035
= 21650

Answer 3

\(217\times45+50\times217+217\times5\)  

\(=217\times\left(45+50+5\right)\) 

\(=217\times100\) 

\(=21700\) 

Anh thấy đề bài thế này mới đúng!

Answer 4

bằng 21650

Answer 5

215\(\times45+50\times217+207\times5\)

=(215+217+207)\(\times\)(45+50+5)

=639\(\times\)100

=63900

Answer 6

  217x45+50x217+207x5
= 217x(45+50)+207x5
= 217x95+207x5
= 20615 + 1035
= 21650

Answer 7

217 x 45 + 50 x 217 + 207 x 5
= 217 x (45+50) + 207x5
= 217 x 95 + 207x5
= 20615 + 1035
= 21650

nha

Answer 8

215x45+50x217+207x5

= 217 x 45 + 50 x 217 + 207 x 5 + 5 x 10 - 50

= 217 x (45 + 50 +5 ) - 50

= 217 x 100 - 50

= 21700 - 50 = 21650