Gram Unit

### 1.1. Knowledge to remember

The gram is a unit of measurement for mass.

Gram is abbreviated as g.

**1000g = 1kg**

In addition to the 1kg, 2kg and 5kg weights, there are also weights:

1g, 2g, 5g

10g, 20g, 50g

100g, 200, 500g.

### 1.2. Solving Textbook Exercises

**Lesson 1: **

__Solution guide:__

- Read or calculate the total mass of the weights of the left pan.
- The mass of the object in the right pan is equal to the result just found.

a) The sugar box weighs 200g.

b) 3 apples weigh in grams: 500+200 = 700g.

c) The package of main noodles weighing in grams is: 200+100 = 300g.

d) The pear weight in grams is: 200+200 = 400.

**Lesson 2:**

__Solution guide:__

Observe what number the hand of the scale is pointing to and then answer the question of the problem.

a) The papaya fruit weighs 800g.

b) Cabbage weighs 600g.

**Lesson 3:** Calculate (according to form)

Model: 22g+47g = 69g

a) 163g+28g = b) 50g×2 =

42g–25g = 96g : 3 =

100g+45g–26g =

__Solution guide:__

- Perform calculations with numbers.
- Write the units of grams after the result you just found.

a) 163g+28g = 191g b) 50g×2 = 100g

42g–25g = 17g 96g : 3 = 32g

100g+45g–26g = 119g.

**Lesson 4: **The whole milk box weighs 455g455g, the box weighs 58g58g. How many grams of milk are in the box?

__Solution guide:__

*Summary:*

Whole box: 455g

Box: 58g

In the box : … g milk ?

To find the solution, we subtract the mass of the whole box from the weight of the milk carton.

*Solution*

The number of grams of milk in the box is:

455–58 = 397(g)

Answer: 397 g.

**Lesson 5:** Each bag of MSG weighs 210g. How many grams do 4 bags of MSG like that weigh?

__Solution guide:__

*Summary:*

1 bag : 210g

4 bags : ….g ?

To find the solution we multiply the mass of a bag by 4.

*Solution*

All 4 packages of MSG weighing in grams are:

210×4 = 840g

Answer: 840 g.

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