The deadliest was a car bomb in the northern Shiite neighbourhood of Sadr City, which has been frequently targeted and where security is usually heightened ahead of Friday prayers.
At least seven people were killed and 21 wounded in the explosion that rocked one of the large neighbourhood's main streets, a police colonel and hospital sources said.
Three roadside bombs also went off almost simultaneously near a Shiite mosque close to the central Kholani square, killing three people and wounding eight, two police officers said.
But it has continued to wreak havoc in the capital, mainly with suicide attacks, car bombs and improvised explosive devices targeting security forces.