Can you solve these Anagrams? N E T S A T O M I I T O M I X P O P A N I R D O N G U N I R Rounding Up or down? Rounding Rounding is used to approximate or estimate. Numbers are usually rounded up or down to the nearest 10, 100, 1000, , or even a 1, ! Numbers can be rounded either up or down Lets see how well you are doing. Step 1 in the steps to success continued 1) Identify the units digit. Take a look at these number lines. continued If a number ends in a 5, 6, 7, 8 or 9 If a number ends in a 1, 2, 3 and 4 So 15, 16, 17, 18 and 19 round up So 21, 22, 23 and 24 round down Now for the next 2 steps to success. continued 2) Numbers that end with a 5, 6, 7, 8 or 9 round up 3) Numbers that end with a 1, 2, 3 or 4 round down Can you see if these numbers need to be rounded up or down. continued Is it closer to 20 or 30? ROUND DOWN ! Does it end in a 1, 2, 3 or 4? Is it closer to 30 or 40? ROUND UP ! Does it end in a 5, 6, 7, 8 or 9? continued Rounding to the nearest 10 continued Steps to success When rounding to the nearest 10 there are three main things to remember; 1) Identify the units digit. 2) If the units digit is a 1, 2, 3 or 4 we round down. 3) If the units digit is a 5, 6, 7, 8, or 9 we round up. Onto the next step. Can you remember it? continued 2) If the units digit is a 1, 2, 3 or 4 we round down. continued Now for the final step. Can you remember it? continued 3) If the units digit is a 5, 6, 7, 8, or 9 we round up. continued Lets have a go at these; continued (a) 48 50 (b) 95 100 (c) 552 550 (d) 716 720 (e) 7,187 7,190 (f) 43,754 43,750 Classwork Rounding numbers to the nearest 10 Draw number lines Homework STP 7A Pg 13 Exercise 1H 1-10 Change the title to: Round each of the following numbers to the nearest 10