LC: To solve word problems in length using + or -.
What do you know?
1m 1m = 100cm
89cm
Total means +
100 + 89 = 189cm
What do you know?
3m 3m = 300cm
64cm
How much did he use? That must be -
300 - 64 = 236cm
What do you know?
Lulu 1m 38 cm or 138cm
Holly is 109cm or 1m 9cm
Lulu is taller