Đáp án+Giải thích các bước giải:
A=(23.1009/7.23.1009+7.1009/7.23.1009-7.23/7.23.1009):(23.1009/7.23.1009+7.1009/7.23.1009-7.23/7.23.1009+1/7.23.1009)+1:[(7+23).1009-(7.23-1)]
A=(23.1009+7.1009-7.23/7.23.1009):(23.1009+7.1009-7.23+1/7.23.1009)+1:(7.1009+23.1009-7.23+1)
A=(23.1009+7.1009-7.23/23.1009+7.1009-7.23+1)
A=23.1009+7.1009-7.23+1/23.1009+7.1009-7.23+1
A=1