"Packaging Box" PPT courseware 3

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"Packaging Box" PPT courseware 3

1. Situation introduction

Which milk box contains more milk?

What questions can you ask?

2. Cooperation and exploration

Which milk box has more milk?

Whichever box has more space will hold more.

Use the same cup to measure.

Red milk cartons contain more milk.

The volume of objects that a container can hold is called their volume.

Do you know what units are used to measure volume?

Volume is generally measured in volume units. However, when measuring the volume of liquids, such as water, oil, etc., the commonly used volume units are liters and milliliters. Liters and milliliters can also be written as L and mL.

3. Independent practice

1. Fill in the appropriate volume unit.

The capacity of a mineral water bucket is approximately 20 ( ).

The capacity of the ink bottle is approximately 60 ( ).

The volume of the yogurt box is approximately 240 ( ).

The capacity of the refrigerator is approximately 220 ( ).

2. Discuss right from wrong with a sharp eye.

(1) The volume of objects that a container can hold is called their volume. ( )

(2) To measure the volume of liquid, the commonly used volume units are liters and milliliters. ( )

(3) 1 milliliter is equal to 1 cubic decimeter. ( )

(4) The conversion rate between liters and milliliters is 100. ( )

3. Rewrite names and numbers.

3.03dm3 = ( )L 0.5m3 = ( )dm3

800cm3 = ( )dm3 4526mL = ( )cm3

320mL = ( ) L 2340L = ( ) m3

4. Estimate and fill in.

5. A bottle of mineral water is 500mL, and the volume of a paper cup is about 120mL.

(1) How many glasses can a bottle of mineral water hold?

500 ÷ 120 ≈ 4 (cups)

A: Makes about 4 cups.

(2) On average, a person needs to drink approximately 1,300 ml of water every day. If you use such a paper cup, approximately how many cups do you need to drink per day?

1300÷120≈11 (cup)

Answer: You need to drink about 11 glasses of water every day.

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Update Time: 2024-09-12

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