Question

(а+900):2,если а=4,40,400,4000,40000

Answer 1

(4+900)÷2=452
(40+900)÷2=470
(400+900)÷2=650
(4000+900)÷2=2450
(40000+900)÷2=20450

Answer 2

$1)a = 4$
$(4 + 900) \div 2 = 452$
$2)a = 40$
$(40 + 900) \div 2 = 470$
$3)a = 400$
$(400 + 900) + 2 = 650$
$4)a = 4000$
$(4000 + 900) \div 2 = 2450$
$5)a = 40000$
$(40000 + 900) \div 2 = 20450$