Page 98 - Start Up Mathematics_5

4. For the given decimal numbers, write the integral part and the decimal part.

(a) 74.26 integral part = ____________ decimal part = ____________
(b) 130.02 integral part = ____________ decimal part = ____________

(c) 9,876.172 integral part = ____________ decimal part = ____________
(d) 5.0028 integral part = ____________ decimal part = ____________

Like and Unlike Decimals

Decimal numbers which have equal number of digits after Remember
the decimal point, i.e., in their decimal part are called like
decimals. The whole parts of the
decimal numbers are not
For example, 63.04, 7.95 and 21.26 are like decimals as considered to decide if they
they all have two digits after the decimal point. are like or unlike.

Decimal numbers in which the number of digits after the
decimal point are not equal are called unlike decimals.
For example, 72.15, 8.024 and 198.6 are unlike decimals.

Converting unlike decimals to like decimals

Example 2: Convert 6.04, 19.217, 30.58 and 716.0028 Remember
to like decimals. The value of a decimal number

Solution: In the given numbers, the maximum does not change by writing any
number of digits in the decimal part is 4. number of zeros after the
last digit in the decimal
So, we need 4 digits in the decimal part of part.
each decimal number to make them like For example, 5.4 = 5.40 = 5.400
decimals.
So, 6.04 = 6.0400, 19.217 = 19.2170, 30.58 = 30.5800
Thus, 6.0400, 19.2170, 30.5800 and 716.0028 are like decimal numbers.

EXERCISE 6.2

1. Separate the like decimals.

(a) 7.21, 14.6, 28.04, 100.9 (b) 19.04, 13.75, 120.2, 79.8 (c) 1.02, 2.348, 6.07, 21.186

(d) 0.24, 0.591, 1.26, 3.009 (e) 92.9, 93.8, 99.75, 90.5 (f) 11.29, 6.104, 13.008, 19.07
2. Change the following unlike decimals to like decimals.

(a) 64.48, 92.4, 7.175, 128.3 (b) 3.1426, 19.07, 25.8, 41.002

(c) 1.01, 1.32, 2.5, 7.9 (d) 101.26, 34.758, 215.7, 381.24
(e) 59.08, 617.019, 28.1026, 88.5 (f) 14.03, 256.9, 74.215, 439.1764

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