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Answer:
24.80+3/10+2/100=8.32
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21. 217 + ( - 47 ) - (- 60)
→ 217 - 47 + 60
→ 277 - 47 = 230
22. x : 45 :: 4 : 15
→ 15x = 45 × 4
→ 15x = 180
→ x = 180/15 = 12
23. 9½ - 5⅙
→ 19/2 - 31/6
→ (57 - 31)/6
→ 26/6 = 4⅓
24. 80 + 3/10 + 2/100
→ 80 + 0.3 + 0.02
→ 80.32
25. Length of garden = 50 m
Area of garden = 300 m²
Given that, The garden is rectangular.
Then,
- Width of garden = (Area of garden)/(Length of garden)
→ Width of garden = 300/50 = 6 m
26.
(i) This expression is formed by adding 9 to an unknown number x
(ii) This expression is obtained when an unknown number x is divided by 8
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