Practice solving math problems
1.1. Knowledge to remember
- Review the subtraction of two-digit numbers.
- Review the subtraction of three-digit numbers.
1.2. Solving Textbook Exercises
Lesson 1: Team One can plant
trees, Team Two planted more trees than Team One
tree. How many trees can Team Two plant?
- The number of trees planted by Team Two is equal to the number of plants that Team One planted plus
The number of plants that Team Two can plant is:
Lesson 2: A morning shop sells
gasoline, sold less in the afternoon than in the morning
gasoline. How many liters of gasoline did that store sell in the afternoon?
- Selling less in the afternoon than in the morning, so if we want to find how many liters of gasoline we will sell in the afternoon, we perform the subtraction
The number of liters of gasoline sold in the afternoon is:
Answer:Liter of gasoline
Lesson 3: Solve the problem (according to the model)
a) The top row has 7 oranges, the bottom row has 5 oranges. How many oranges are there in the top row than the bottom row?
The number of oranges in the top row is more than the number of oranges in the bottom row:
Answer: 2 oranges
b) Class 3A has
female friends and
boy friend. How many more female friends than male friends?
More female than male: … you?
The number of female friends is more than the number of male friends:
Lesson 4: Weight bag of rice
kg, bag of corn weight
kg. How many kilograms lighter is a bag of corn than a bag of rice?
Bag of corn:kg
A bag of corn is lighter than a bag of rice: … kg?
The number of kilograms of a bag of corn lighter than a bag of rice is:
Answer: 15 kg