Question

length and area

1. order these lengths from shortest to longest:

5 m 1 km 52 cm 138 mm 18 cm

1. fill in the blank so that the statement is true.

a) 1 cm = ______ mm
b) 1 m = ______ mm
c) 5.2 m = ______ mm

1. fill in the missing values.

a) 100 mm = ______ cm
b) 6.14 m = ______ cm
c) 1280 mm = ______ cm

1. fill in the missing values.

a) 7 km = ______ m
b) 1.38 km = ______ m

Explanation:

Step1: Convert all lengths to mm

5 m = 5000 mm, 1 km = 1000000 mm, 52 cm = 520 mm, 138 mm = 138 mm, 18 cm = 180 mm

Step2: Order from shortest to longest

138 mm < 180 mm < 520 mm < 5000 mm < 1000000 mm

Step3: Solve unit conversion blanks

a) 1 cm = 10 mm; b) 1 m = 1000 mm; c) 5.2 m = 5200 mm
a) 100 mm = 10 cm; b) 6.14 m = 614 cm; c) 1280 mm = 128 cm
a) 7 km = 7000 m; b) 1.38 km = 1380 m

Answer:

1. 138 mm, 18 cm, 52 cm, 5 m, 1 km

2a) 10
2b) 1000
2c) 5200
3a) 10
3b) 614
3c) 128
4a) 7000
4b) 1380