Question

= 900
The number of 3 – digit numbers between 100 and 999 = (999 – 100) – 1
= 898
USING BRACKETS:
Using brackets can simplify mathematical calculations.
Example :
7 × 109 = 7 × (100 + 9) = 7 × 100 + 7 × 9 = 700 + 63 = 763
7 × 100 + 6 × 100 = 100 × (7 + 6) = 100 × 13 = 1300
We follow an order to carry out mathematical operations. It is called as BODMAS
rule.
ESTIMATION OF THE NUMBERS
A reasonable guess of the actual value is called an estimate.
Rules of Estimation
1)Estimatingnumbers to the nearest tens is done by rounding off numbers 1, 2, 3
and 4 to 0 and number 6, 7, 8, 9 to 10.
2) Estimating numbers to the nearest hundreds is done by rounding off numbers 1 to
49 to 0 and numbers 51 to 99 to 100.

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Answer:

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