(Wish-Congratulations) ×× Spring × (Good Festival) =9
Zhu-(He Chun)-Anta = 1
Wish+Congratulations+Spring-(Festival+Beautiful) =9
Zhu-He+Chun× (Good Festival) =7
2. On New Year's Eve, lanterns are hung, bright and brightly lit.
On the count of three, the whole number is used up, and on the count of five, there is one left.
It's just a coincidence to count to seven or seven, but it still takes three to count to eight or eight.
Please guess, there are at least () kinds of lights.
3. Tongue twister:
There are hundreds of contestants, and Xiao Ming is the youngest.
To know how old he is, please look at the tongue twister:
Age family age, age minus age;
Age multiplied by age, age divided by age;
All of them add up to exactly one hundred.
Please calculate it. Xiaoming is () years old this year.
Extended data
1, elementary arithmetic order: when operating at the same level, it is calculated from left to right in turn; Two-stage operation, first multiply and then divide, then add and subtract.
When there are brackets, count the inside of brackets first, and then count the outside of brackets; When there are multiple brackets, count the brackets first, then the brackets inside, then the braces inside, and finally the brackets outside.
2. Multiplication is a simple operation of addition and division is a simple operation of subtraction. Subtraction and addition are reciprocal operations, and division and multiplication are reciprocal operations.
When several addends are added, the positions of addends can be exchanged at will; Or add a few addends first and then add them with other addends, and the sum remains the same.
Subtracting the sum of two numbers from a number is equivalent to subtracting each addend in the sum from this number in turn.