ESTIMATION Estimation means an approximate calculation.

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Presentation transcript:

ESTIMATION Estimation means an approximate calculation.

Without actual measurement, we estimate Lily’s height to be 120 cm. …we estimate the board’s length to be 2 wah.

…we estimate the box’ height to be 20 cm. …we estimate the toy gun’s length to be 10 cm.

Baby Yan- yan’s height: a.68 cm b. 58 cm

The praying mantis’ length: a.32mm b. 35mm

Teacher Toto’s height: a.164 cm b. 250cm

The elephant’s height: a.2 wah b. 1 wah

1. Circle the appropriate eye-estimation. ab a. Length of a pen 140 cm14 cm b. Height of a student 120 m120 cm c. Height of my parent 160 cm160m d. Length of a desk 300cm30m e. Height of the room 8 m80 cm f. Height of a rubber 30 cm3 cm g. Length of a comb 20 cm10 cm h. Length of a notebook 30 cm5 cm

2. E stimate the length or height of the objects below. Indicate the errors.

3. Estimate the perimeter of the given shapes in centimeter. Then, measure using the ruler. Indicate the error. ShapesEstimate (cm)Using ruler (cm) Error (cm) Example: 13-8 =5 cm a. b. c. d. e. 5cm 3 cm Perimeter= 13 cm 5cm 3 cm 2 cm 3 cm

Exercise 4: Solving Word Problems on Length a.There are 4 poles located in equal distance from each other. If the distance between the first pole and the last pole is 9 km, what is the distance between the poles in meters.  9 km ? _ m

Exercise 4: Solving Word Problems on Length b. The length of a harvest field is 60 wah. Find the length of one and a half of it in meters. 60 wah Figure B Figure A ? m

Exercise 4: Solving Word Problems on Length c.A cable wire with the length of 4 km is cut into 6 equal pieces. What is the length of each piece in meters. ? m