Question

giúp em với ạ

Answer 1

34,56+(12,3+8,7)

=34,56+21

=55,56

Answer 2

a) 12,3 + 34,56 + 8,7
= (12, 3 + 8,7) + 34,56
= 21 + 34,56
= 55,56

b) 12,56 + 34,46 + 87,44 + 5,54
= (12,56 + 87,44) + (34,46 + 5,54)
= 100 + 40
= 140

Answer 3

(12,56+87,44)+(34,46+5,54)

=100+40 

=140

Answer 4

a) 12,3 + 34,56 + 8,7
= (12, 3 + 8,7) + 34,56
= 21 + 34,56
= 55,56
b) 12,56 + 34,46 + 87,44 + 5,54
= (12,56 + 87,44) + (34,46 + 5,54)
= 100 + 40
= 140