Page 195 - SK Year 5 Mathematics DLP

DIVISION OF UNITS OF LENGTH

1 What is the thickness of a 10 sen coin?
12 mm ÷ 8 = mm

1 . 5 mm
8 1 2 . 0 mm
− 8
4 0
− 4 0 12 mm
0

1.5
12 mm ÷ 8 = mm
The thickness of a 10 sen coin is 1.5 mm.

1
2 45.18 cm ÷ 9 = mm 3 3 m ÷ 16 = cm
5
Step 1 Step 1
5 . 0 2 cm 1 16 20

9 4 5 . 1 8 cm 3 m = ( 5 × 100) cm
5
−4 5 1
0 1 = 320 cm
− 0
1 8
− 1 8 Step 2
0
2 0 cm
Step 2 1 6 3 2 0 cm

– 3 2
5.02 cm = (5.02 × 10) mm 0 0
= 50.2 mm – 0

45.18 cm ÷ 9 = 50.2 mm 0

1
3 m ÷ 16 = 20 cm
Can you convert to mm unit 5
first, then divide? Discuss.

• Carry out simulation activities such as finding the thickness of 187
5.1.6
a book from a stack of similar books.