Rounding off

Transcript

Rounding offRounding off means when we find approximate numbers In general Numbers 431, 432, 433, 434 will be rounded off to 430. Numbers 436, 437, 438, 439 will be rounded off to 440 Number 435, the middle most number will always be larger, i.e 440 Rounding off to nearest Hundred (100) For number 583, Rounding off to nearest Hundred means We write number as 500 or 600 Since 600 is near to 583 In general, Thus, 521 → 500 548 → 500 550 → 600 569 → 600 578 → 600 Rounding off to nearest Thousand (1000) For number 2031, Rounding off to nearest Thousand means We write number as 2000 or 3000 Since 2000 is near to 2031 In general, Thus 2851 → 3000 2918 → 3000 2500 → 3000 2501 → 3000 2499 → 2000 2281 → 2000 We either round up, or round down Rounding off means we make the number simpler Let’s look at how we round off. Rounding off to nearest ten (10) Suppose we are given the number 432 Rounding off to nearest tens means We write numbers as 430 or 440 Since 430 is near to 432.