Page 18 - Start Up Mathematics_3

Thus, compare the digits at the tens place.

5 8 6 1 5 8 7 5

6 at the tens place 7 at the tens place

Since 6 < 7, 5861 < 5875.

5. Compare 7861 and 7865.

7 8 6 1 7 8 6 5

The digits at the thousands, hundreds and tens place are same in both the
numbers. Thus, compare the digits at the ones place.

7 8 6 1 7 8 6 5

1 at the ones place 5 at the ones place

Since 1 < 5, 7861 < 7865.

Remember Mental Maths

If all the digits in both the Which of these is greater?
numbers are same then (a) 6289 6298
the numbers are equal
and we use the sign ‘=’. (b) 7341 7340

Before, After and Between

The numbers which follow one after the other are Remember
called consecutive numbers. For example, 1316, 1317,
1318, 1319, 1320 are consecutive numbers. Consecutive numbers can
also be written backwards.
A number one less than a given number comes just For example, 1320, 1319,
before it and is called its predecessor. 1318, 1317, 1316

A number one more than a given number comes just
after it and is called its successor.

Consider a 4-digit number 5863.

Its predecessor = 5863 – 1 = 5862 and its successor = 5863 + 1 = 5864.

5862 5863 5864

predecessor is between 5862 and 5864 successor

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