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प्रश्न
Find the value of:
2.12 - 0.45
बेरीज
उत्तर
Let x = 2.12 ....(i)
⇒ 100x = 212.12 ....(ii)
Subtracting (i) from (ii),
99x = 210
⇒ x = `(210)/(99)`
= `(70)/(33)`
Let y = 0.45
⇒ 10y = 4.5 ....(iii)
⇒ 100y = 45.5 ....(iv)
Subtracting (iii) from (iv),
90y = 41
⇒ y = `(41)/(90)`
∴ 2.12 - 0.45 = x - y
= `(70)/(33) - (41)/(90)`
= `(70 xx 30 - 41 xx 11)/(990)`
= `(2100 - 451)/(990)`
= `(1649)/(990)`
= 1.665
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