(1) ratio 1: 100 means _ _?
(2) Measure the length and width of Lingling's bedroom in the plan. The actual area of Lingling's bedroom is square meters.
(3) What is the total area of Lingling's home?
Lingling drew a plan of her bedroom in her notebook. She expressed the length of the bedroom by 8 cm. What is the scale of the floor plan she drew?
The scale of (1) 1: 100 indicates that 1 cm represents the actual distance of 100 cm.
(2) Lingling's bedroom is 2.5 cm long and 2.4 cm wide in the plan.
The actual length of Lingling's bedroom is 2.5÷1100 = 250 cm = 2.5 meters.
Width: 2.4 ÷1100 = 240cm = 2.4m.
Area: 2.5×2.4=6 (square meters).
(3) With a ruler, it can be directly measured that Lingling's house is 6.3 cm long and 4.8 cm wide.
The total area of Lingling's house is:
(6.3÷ 1/ 100 ? )×(4.8÷ 1/ 100 )÷ 10000
=630×480÷ 10000
=30.24 square meters
A: The total area of Lingling's home is 30.24 square meters.
(4) 2.4m = 240cm，240÷8=30 (cm)，
8:240= 1:30,
A: 1 cm on the map means that the actual distance is 30 cm, and the scale of the plan she drew is1:30;