Encourage students to notice the relationship between the numbers in the blanks as they complete this headline story.
On a spring morning on Bird Island, Antarctica, the temperature was _____. By noon it had risen _____ degrees to _____, but it was still below zero. By 3:00 the temperature had risen _____ more degrees and finally reached 0. By 8:00 in the evening the temperature dropped _____ degrees and it was colder then than in the morning.