First, the application of addition
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Example: 1, one number is 9 and the other number is 13. What is the sum of these two numbers? 9+ 13=2 1
How much is a * * *?
Example 1. Xiaoming has five apples and Xiaohong has eight apples. How many apples do Xiaoming and Xiaohong have? 5+8= 13 (piece)
2.2 1 class 45, class 22 48, how many people are there in class 1? 45+48=93 (person)
Other types of summation problems
Example: 1, 18 pieces of wood have been shipped away, leaving 25 pieces. How many pieces are there in this pile of wood? 18+25=4 1 (root)
Second, the difference in the application of subtraction
Example: 1, one number is 19 and the other number is 13. What's the difference between these two figures? 19- 13=6
How much more?
Example: 1, Xiaoming has 15 apples, and Xiaohong has 8 apples. How many apples does Xiaoming have than Xiaohong? 15-8=7 (piece)
How much is missing?
Example: 1, Xiaoming has 15 apples, and Xiaohong has 8 apples. How many apples is Xiaohong less than Xiaoming? 15-8=7. What's the difference?
Example: 1, Xiaoming wants to make 15 red flowers. Xiaoming has already bloomed eight red flowers. How many red flowers does Xiaoming want to open? 15-8=7 (flowers)
How much is left
For example: 1. A rope is 47 meters long and takes 28 meters. How many meters are left? 47-28= 19 (m)
Third, the application of multiplication
The same arrangement
For example: 1. There are three peaches in each plate and five peaches in one plate. How many peaches are put in these five plates? 3×5= 15 (piece)
2. There are 5 cats in each row and 4 cats in each row. How many kittens are there in a row? 5×4=20 (only)
3. The students are rowing. There are three students on each boat. How many students are there on three ships? 3×3=9 (name)
4. How many gloves are there in a pair and three pairs? 2×3=6 (only)
A car has four wheels. How many wheels do four cars have? 4×4= 16 (piece)
Multiple problems
For example: 1. Xiaoming has seven chickens, and the number of ducks is four times that of chickens. How many ducks does Xiaoming have? 7×4=28 (only)
The kitten is seven years old, and his father is five times his age. How old is dad this year? 7×5=35 years
Fourthly, the average distribution problem of division application problem.
Example: 1, a * * * has 24 apples, which are distributed to 4 children on average. How many apples does each child get? 24÷4=6 (piece)
There are 48 rubber balls, and there are 8 in each basket. How many baskets can you put? 48÷8=6 (basket)
3. There are 72 sheets of white paper, and every 8 sheets are set as 1. How many copies can I order? 72÷8=9 (Ben)
Buy pens with 20 yuan money, each 5 yuan. How many pens can I buy? 20÷5=4 (branch)
5. 56 extra-curricular books, divided into 7 groups. How many books are there in each group? 56÷7=8 (Ben)
Multiple problems
Example: 1, Xiaohong has 28 apples. Xiaohong has four times as many apples as Xiaoming. How many apples does Xiaoming have? 28÷4=7 (pieces)
Grandma Zhang keeps 8 chickens and 72 ducklings. How many times does the duckling have? 72÷8=9
Grandma is 36 years old and her mother is six times as old as her daughter. How old is her daughter this year? 36÷6=6 (years old).
The school bought 28 basketballs, four times as many as football. How many footballs did you buy? 28÷4=7 (pieces)
5. There are 42 white flowers, 7 times as many as safflower. How many red flowers are there? 42÷7=6 (flowers)
6. There are 72 non-non game cards, and Yang Yang has 8. How many non-non game cards are there in Yang Yang? 72÷8=9
Note: the unit is double-word without unit.