Sing
kir
b
2.1: Warmer and Colder
1. Complete the table and draw a number line diagram for each situation.
start (°C) change (°C)
final (C)
addition equation
al +40 L 10 degrees warmer
+50
40 + 10 = 50
+40
5 degrees colder
+40
30 degrees colder
+40
40 degrees colder
+40
50 degrees colder
-40-35 -30 -25-20-15-10 -5 0 5 10 15 20 25 30 35 40 45 50
LE+
0 5 10 15 20 25 30 35 40 45 50
-40 -35 -30 -25 -20 -15 -10 -5
c
d|

to ti to
0
5
10 15 20 25 30 35 40 45 50
_
L
-30 -25 -20 -15 -10 -5
0
5
10 15 20 25 30 35 40 45
x
-40 -35 -30 -25 -20 -15 -10 -5
0
5
10 15 20 25 30 35 40 45 50
-40 -35 -30 -25 -20 -15 -10 -5