Page 105 - Demo

104 Arrow-Puffin-3_Semester-1 MathsSimilarly, when we say there were about 1000 cars outside a shopping mall, the actual number could be 975 or 1232.Rounding means making a number simpler but keeping its value close to what it was. The result is less accurate but easy to remember.Estimating (rounding off) to the nearest 1030 31 32 33 34 35 36 37 38 39 40HalfwayThe numbers that are halfway or above are rounded off to the next 10 and the numbers that are less than halfway are rounded off to the existing number.Examples: %u2022 32 is closer to 30 (or less than halfway) so, it can be rounded to 30.%u2022 37 is closer to 40 (or more than halfway) so, it can be rounded to 40.%u2022 35 is closer to 40 (or at the halfway) so, it can be rounded to 40. Estimating (rounding off) to the nearest 100300 310 320 330 340 350 360 370 380 390 400HalfwayThe numbers that are halfway or above are rounded off to the next 100 and the numbers that are less than halfway are rounded off to the existing 100.Examples: %u2022 320 is closer to 300, (less than halfway) so, it can be rounded to 300.%u2022 360 is closer to 400 (above the halfway) so, it can be rounded to 400.%u2022 350 is closer to 400 (at the halfway) so, it can be rounded to 400.As we have to round off to nearest hundred, we see the digit next to 6.Estimating (rounding off) to the nearest 10007000 7100 7200 7300 7400 7500 7600 7700 7800 7900 8000Halfway