1.6 · The four operationsLesson 1 of 12Free preview
Numbers below zero: temperature changes
A rise moves right on the number line and a fall moves left. A freezer at -18 °C warming by 5 degrees reaches -13 °C.
1.6 · The four operationsLesson 1 of 12Free preview
A rise moves right on the number line and a fall moves left. A freezer at -18 °C warming by 5 degrees reaches -13 °C.