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Question
Estimateeach of the following using general rule:
(a) 730 +998 (b) 796 − 314 (c) 12, 904 + 2, 888
(d) 28,292 − 21, 496
Make tenmore such examples of addition, subtraction and estimation of theiroutcome.
Estimateeach of the following using general rule:
(a) 730 +998 (b) 796 − 314 (c) 12, 904 + 2, 888
(d) 28,292 − 21, 496
Make tenmore such examples of addition, subtraction and estimation of theiroutcome.
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Solution
(a) 730 +998
By rounding off to hundreds, 730 rounds off to 700 and 998 rounds offto 1000.
(b) 796 −314
By rounding off to hundreds, 796 rounds off to 800 and 314 rounds offto 300.
(c) 12904+ 2822
By rounding off to thousands, 12904 rounds off to 13000 and 2822rounds off to 3000.
(d) 28,296− 21,496
By rounding off to nearest thousands, 28296 rounds off to 28000 and21496 rounds off to 21000.
(a) 730 +998
By rounding off to hundreds, 730 rounds off to 700 and 998 rounds offto 1000.
(b) 796 −314
By rounding off to hundreds, 796 rounds off to 800 and 314 rounds offto 300.
(c) 12904+ 2822
By rounding off to thousands, 12904 rounds off to 13000 and 2822rounds off to 3000.
(d) 28,296− 21,496
By rounding off to nearest thousands, 28296 rounds off to 28000 and21496 rounds off to 21000.
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