こんいちわ(konnichiwa) this is correct

こんいちわ(konnichiwa) this is correct

“こんにちは” is pronounced “ko-n-ni-chi-wa”. On some informal occasions people might say “ko-n-chi-wa”, omitting the sound “ni”.

As Yutaka says, the こんにちは is correct. However, the word splitting for the rest of that lesson is terrible. You might want to use this Romaji (romanised Japanese) to help you work out where words begin & end:

Konnichiwa. こんにちは。

Watashi wa Tanaka Mayumi desu. わたし は たなか まゆみ です。

Watashi wa Nihon-jin desu. わたし は にほんじん です。

Watashi wa 25-sai desu. わたし は にじゅうごさい です。

Note that the wa here written as は is a grammar particle/marker, so it’s not pronounced as “ha” when used this way. (Otherwise, は is normally pronounced as “ha”)