Question 40: When can the calculation x - 5 be done? …

## Question 39: Lets calculate 231 – 87. Choose the correct conclusion?

Question 39: Lets calculate 231 - 87. Choose the correct conclusion? …

## Question 38: It is allowed to divide x:3 = 6, then the quotient of the division is?

Question 38: It is allowed to divide x:3 = 6, then the quotient of the division is? …

## Question 37: What is the general form of a natural number that is divisible by 3?

Question 37: What is the general form of a natural number that is divisible by 3? …

## Question 36: What is the general form of a natural number divided by 5 with remainder 2?

Question 36: What is the general form of a natural number divided by 5 with remainder 2? …

## Question 35: Quickly calculate 49.15 – 49.5, the result is:

Question 35: Quickly calculate 49.15 - 49.5, the result is: …

## Question 34: What is the result of the calculation 12,100 + 100.36 – 100.19?

Question 34: What is the result of the calculation 12,100 + 100.36 - 100.19? …

## Question 33: Calculate mentally by adding to one term and subtracting from the other term the same appropriate number:

Question 33: Calculate mentally by adding to one term and subtracting from the other term the same appropriate …

## Question 32: Do the calculation (56.35 + 56.18):53 we get the result

Question 32: Do the calculation (56.35 + 56.18):53 we get the result …

## Question 31: Mentally calculate by multiplying one factor and dividing the other by the same appropriate number: 14. 50

Question 31: Mentally calculate by multiplying one factor and dividing the other by the same appropriate number: 14. …