Question

Помогите решить номер 184

Answer 1

$a) \: (3426 + 2345) - 345 = 3426 + (2345 - 345) = 3426 + 2000 = 5426$
$b) \: 12387 - (12187 - 887) = (12387 - 12187) + 887 = 200 + 887 = 1087$
$c) \: (3453 + 898) - 2353 = (3453 - 2353) + 898 = 1100 + 898 = 1998$
$d) \: (6578 + 1437) - 1578 = (6578 - 1578) + 1437 = 5000 + 1437 = 6437$

Answer 2

(3426+2345)-345=3426+(2345-345)=3426+2000=5426
12387-(12187-887)=(12387-12187)+887=1087
(3543+898)-2353=(3543-2353)+898=2088
(6578+1437)-1578=(6578-1578)+1437=6437