Let me give you an example:

The estimate of 38* 15 is to estimate 38 as 40 and get married as 600.

Estimate 15*63

15×63

≈ 15×60

=900

The third grade math volume is estimated by quadratic method-yes, 37 can be estimated as 40, 42 can be estimated as 40, 40 times 40≈ 1600.

How to estimate the third grade multiplication123 * 8-123 * 8 ≈100 *1000 = rounded to the nearest five places, less than the nearest one-123, and the second place 2 is less than the nearest five places-/kloc

How to calculate the estimated value of 152 multiplied by 4 in the third grade of primary school-for the convenience of calculation, 152 is about 150, and 4 can be omitted, because it is very simple to multiply three digits by one digit. 150*4 =600 The answer is 600.

The method of estimating 582 * 5 in the third grade of primary school-The method of estimating 582*5582 in the third grade of primary school can be regarded as (600). 582*6≈600*5=3000

How to calculate the estimated usage of the third grade of primary school-first calculate the total number of students, then divide the total number by 3, and finally compare the available number with 1.

How to calculate the two-digit multiplication estimation of carry in the third grade of primary school? -Estimate15 * 6315 * 63 ≈15 * 60 = 900.

How to estimate fractional multiplication-25 times 9 is about 2500.

What is the third grade estimate of 269 times 4≈269? The third grade of primary school is estimated to be 269 times 4≈ 1080, and 269 is 270.