Officials say the deadliest attack occurred on February 28 when two bombs exploded in the Shula district in northwestern Baghdad.
The twin bombings occurred outside a restaurant and near a football field, killing at least 15 people.
Other blasts took place in the towns of Aziziyah, Mahmudiya, and in the Shurta al-Rabea area of south Baghdad.
There was no immediate claim of responsibility.
The attacks come a day before thousands of Sunni Muslims are expected to rally against Prime Minister Nuri al-Maliki.
Sunni Muslims have been protesting for the past two months what they describe as unfair treatment by the Shi’ite-led government.