Question

37.24+37.76+63.79+21.63

69.113-27.69+69.14+31

53.39-47.39+53.21+47.2

72.121+27.121+121

Giúp mk nha !!!!! (>\\\o\\\<)

Answer 1

37.24 + 37.76 + 63 . 79 + 21 . 63

= 37 . ( 24 + 76 ) + 63 . ( 79 + 21 )

= 37 . 100 + 63 . 100

= 3700 + 6300

= 10000

Answer 2

a) 37.24 + 37.76 + 63.79 + 21.63

=  37.(24 + 76) + 63.(79 + 21)

=  37.100 + 63. 100

=  100.(37 +63)

=  100.100

= 10000

b) 69.113 - 27.69 + 69.14 + 31

=  69.(113 - 27 + 14) +31

=  69.100 + 31

= 6931

c) 72.121 + 27.121 + 121

=  121.(72 + 27 + 1)

=  121.100

=  12100

Answer 3

-51.(-72) - 72.121