Exercise: 3-B
Q1: Add
i. 9.67, 15.98
\[
9.67 + 15.98 = 25.65
\]Answer: 25.65
ii. 6.9, 23.84
\[
6.9 + 23.84 = 30.74
\]Answer: 30.74
iii. 35.67, 18.794, 4.9, 31.82
\[
35.67 + 18.794 + 4.9 + 31.82 = 91.184
\]Answer: 91.184
iv. 63.05, 24.839, 3.7, 16.85
\[
63.05 + 24.839 + 3.7 + 16.85 = 108.439
\]Answer: 108.439
Q2: Subtract:
i. 2.975 from 8.23
\[
8.23 – 2.975 = 5.255
\]Answer: 5.255
ii. 0.75 from 1.3
\[
1.3 – 0.75 = 0.55
\]Answer: 0.55
iii. 6.054 from 11.26
\[
11.26 – 6.054 = 5.206
\]Answer: 5.206
iv. 134.68 from 201.3
\[
201.3 – 134.68 = 66.62
\]Answer: 66.62
Q3: Take out 6.345 from 8.1
Subtraction:
\[
8.1 – 6.345 = 1.755
\]Answer: 1.755
Q4: What is the difference between 68.5 and 0.685?
Subtraction:
\[
68.5 – 0.685 = 67.815
\]Answer: 67.815
Q5: What is the excess of 90 over 53.865?
Subtraction:
\[
90 – 53.865 = 36.135
\]Answer: 36.135
Q6: What should be subtracted from 50 to get 34.57?
Subtraction:
\[
50 – 34.57 = 15.43
\]Answer: 15.43
Q7: What should be added to 63.47 to get 91?
Addition:
\[
63.47 + x = 91
\]\[
x = 91 – 63.47
\]\[
x = 27.53
\]Answer: 27.53
Q8: Manish buys a ₹8.75 metro ticket with a ₹20 note. How much money does he get back?
Subtraction:
\[
20 – 8.75 = 11.25
\]Answer: ₹11.25
Q9: A baby increases in weight from 5.58 kg to 6.16 kg. How much weight has the baby gained?
Subtraction:
\[
6.16 – 5.58 = 0.58
\]Answer: 0.58 kg
Q10: Simplify:
i. \( 67 + 13.85 – 29.904 \)
\[
67 + 13.85 – 29.904 = 50.946
\]Answer: 50.946
ii. \( 16.753 + 4.06 – 13.89 \)
\[
16.753 + 4.06 – 13.89 = 6.923
\]Answer: 6.923
iii. \( 1 – 10.5 + 12.213 \)
\[
1 – 10.5 + 12.213 = 2.713
\]Answer: 2.713
iv. \( 81 – 15.68 – 4.2 \)
\[
81 – 15.68 – 4.2 = 61.12
\]Answer: 61.12
v. \( 555 – 55.5 – 5.555 \)
\[
555 – 55.5 – 5.555 = 493.945
\]Answer: 493.945
vi. \( 100 – 32.5 – 46.74 – 12.925 \)
\[
100 – 32.5 – 46.74 – 12.925 = 7.835
\]Answer: 7.835
