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E:\Working\Focus_Learning\Math_Genius_5_(05-10-2023)\Open_Files\CHAP_05
\\February 16, 2024 2:22 PM Surender Prajapati Proof 5 Reader _________________________ Date: ___________________74
3. Subtract the following.
(a) 5.6 from 7.3 (b) 3.1 from 3.456 (c) 1.979 from 20.876
(d) 2.9567 from 15.2 (e) 235.992 from 345.607 (f) 199.785 from 219.625
(g) 20.956 from 21.7 (h) 0.279 from 0.9 (i) 276.841 from 400.596
4. Find the difference.
(a) 12.99 – 3.75 (b) 5.38 – 5.19 (c) 20.654 – 16.59
(d) 19.325 km – 0.273 km (e) 6.267 mL – 5.45 mL (f) 536.275 kg – 364.20 kg
(g) `25.54 – `0.04 (h) 0.695 km – 0.199 km
5. Subtract the sum of 8.36 and 8.07 from 16.85.
6. Subtract the difference of 68.01 and 6.9 from their sum.
7. Add the difference of 65.65 kg and 5.556 kg to their sum.
8. Sameer bought a toothpaste for `31.75, a soap for `41.25 and a shoe polish for
`52.00. He gave a 200-rupee note to the shopkeeper. Find the money he got return
from the shopkeeper.
9. Mamta has a 78.66-metre-long piece of cloth. She cuts a piece of 15.76 metres. What
is the total length of cloth left?
10. A bag contains 80 kg of rice, another bag contains 13.76 kg of rice. What is the total
weight of the rice in the two bags?
11. Total weight of three boys is 98.05 kg. If the weights of two of them are 36.97 kg and
41.03 kg, find the weight of the third boy.
multiPlicatioN of Decimal Numbers
multiplication of a Decimal Number by a Whole Number
To multiply a decimal number by a whole number, follow the following steps:
Step 1: Find the product of both the numbers ignoring the decimal point.
Step 2: Place the decimal point in the product thus obtained after as many places as in the
given decimal from right side to left side.
example 1: Multiply the following:
(a) 32.6 × 4 (b) 63.53 × 5 (c) 1.534 × 176
Solution:
(a) 3 2 6 3 2 • 6 (b) 6 3 5 3 6 3 • 5 3
× 4 × 4 × 5 × 5
1 3 0 4 1 3 0 • 4 3 1 7 6 5 3 1 7 • 6 5
One decimal Two decimal
place places
Thus, 32.6 × 4 = 130.4 Thus, 63.53 × 5 = 317.65
Mathematics-5 115
