Question

find the product of 300×400​

Answer 1

Answer:

simple. I thick you are in nursery

Step-by-step explanation:

120000

Answer 2

Answer:

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.

Consider the following examples on estimating products:

1. Estimate the product: 42 × 57

Solution:

4 2 → 4 0

× 5 7 → × 6 0

2 4 0 0

Thus estimated product = 2400

2. Estimate the product: 47 × 84

Solution:

4 7 × 8 4 47 is rounded up to 50

↓ ↓

5 0 × 8 0 84 is rounded down to 80

= 4 0 0 0

The estimated product = 4000

3. Estimate the product: 74 × 85

Solution:

7 4 × 8 5 74 is rounded up to 80