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Question: 1, , Estimate the following by rounding off each factor to nearest hundreds:, i) 730 + 998, , ii) 796 - 314, , iii) 875 - 384, , Solution:, , i) 700 + 1000 = 1700, , ii) 800 - 300 = 500, , iii) 900 - 400 = 500, , Question: 2, , Estimate the following by rounding off each factor to nearest thousands:, i) 12904 + 2888, , ii) 28292 - 21496, , Solution:, , i) 13000 + 3000 = 16000, , ii) 28000 - 21000 = 7000, , Question: 3, , Estimate the following by rounding off each number to its greatest place:, , i) 439 + 334 + 4317, ii) 8325 - 491, , iii) 108734 - 47599, iv) 898 x 785, , v) 9 x 795, , vi) 87 x 317, , Solution:, , i) 400 + 300 + 4000 = 4700, ii)8000 - 500 = 7500, iii)100000 -500000 = 50000, iv) 900 x 800 = 720000, , v) 10 x 800 = 8000, , vi) 90 x 300 = 27000, , 26