Question

estimate the product by rounding off the 1 st factor up and the 2 nd factor down to the nearest 100. 156*372=?​

Answer 1

Answer:

ok

Step-by-step explanation:

brillant

Answer 2

Answer:

Step-by-step explanation: Estimating products by rounding numbers to the nearest ten, hundred, thousand etc., we know how to estimate the sum, difference, etc., to the nearest 10, 100, 1000, etc. Now we have to estimate the products.

In order to estimate products, we round the given factors to the required place value. Estimating products help us to check the reasonableness of an answer.

To estimate the product, we first round off the multiplier and the multiplicand to the nearest tens, hundreds, or thousands and then multiply the rounded numbers.

I. Estimate the products of 34 and 86.

34 ⟶ 30 34 is rounded down to 30

86 ⟶ 90 86 rounded up to 90

34 ⟶ 30

86 ⟶ 90

34 is rounded down to 30

86 rounded up to 90

Calculate mentally 30 × 90 = 2700  

The estimated product is 2700.  

II. Estimate the products of 331 and 267 by rounding to the nearest hundred.  

331 ⟶ 300

267 ⟶ 300

300 × 300 = 90000

The estimated product is 90000.