Selina Concise Class 7 Math Chapter 4 Decimal Fractions Exercise 4E Solution
EXERCISE 4E
(1) Round off:
(i) 0.07 = 0.1; 0.112 = 0.1, 3.59 = 3.6, 9.489 = 9.5
Contents
(ii) 0.627= 0.63, 100.479 = 100.48, 0.065 = 0.07, 0.024 = 0.02
(iii) 4.83 = 5, 0.86= 1, 451.943 = 452, 9.08 = 9
(2)Simplify, and write your answers correct to the nearest hundredths:
(i) 18.35 × 1.2 = 22.02
(ii) 62.89 × 0.02 = 1.2578 = 1.26
(3) Write the number of significant figures (digits) in:
(i) 35.06 = 4
(ii) 0.35 = 2
(iii) 7.0068 = 5
(iv) 19.0 = 3
(v) 0.0062 = 2
(vi) 4.2 × 0.6 = 2.52 = 3
(vii) 0.08 × 25 = 2 = 1
(viii) 3.6 ÷ 0.12 = 30 = 2
(4) Write:
(i) 35.869 = 35.9; 0.008426 = 0.00843; 4.952 = 4.95; 382.7 = 383
(ii) 60.974 = 60.97, 2.8753 = 2.875; 0.001789 = 0.001789; 400.04 = 400.0
(iii) 14.29462 = 14.295, 19.2 = 19.200, 46356.82 = 46357; 69 = 69.000