Question

Tính nhanh 25.76 + 75.147 + 25.24 - 47.75

Answer 1

\(=25\cdot\left(76+24\right)+75\left(147-47\right)\)

=10000

Answer 2

25. (76+24) + 75.(147-47)

= 25. 100 +75. 100

= 10000

Answer 3

25.76 + 75.147 + 25.24 - 47.75
=[ 25 . ( 76 + 24 )] + [75 . ( 147 – 47 ) ]
= [ 25 . 100 ] + [ 75 . 100 ]
= 2500 + 7500
= 10 000