The solution to estimate how much the multiplication of 983x7 is approximately equal to is as follows:

(1) If necessary, keep the calculated number to a certain place, and the rest will be omitted when the first number is not greater than 4, and will be omitted when it is not less than 5, and the previous number will enter 1. When rounding the integer part, rounding a few integers means adding a few zeros.

(2) It can be known that 983 can be estimated as 1000, so 983×7≈ 1000×7=7000.

Extended data:

Other estimation methods:

(1) One-step method: One-step method is to add 1 to the last digit of the reserved part after removing the redundant digits. The approximation thus obtained is a residual approximation (i.e., greater than the exact value).

For example, a sack can hold 200 Jin of wheat, and there are currently 880 Jin of wheat. How many sacks do you need to wrap it? When 880 is divided by 200, the quotient is 4, and the remainder is 80, that is, 4 sacks are not enough, and 5 sacks are needed.

(2) Truncation method: Truncation method is a commonly used mathematical method, which removes the decimal part of a number and takes its integer part, and its value is approximate (that is, less than the exact value), which is often used in life.