Round off 4518 to the nearest thousand. Then estimate its value. <br> 4530 x 9 <br>≈ <input min="0" type="number" id ="imp5pg003q10c_1" class="lineinput" placeholder="?" /> x 9 <br>= <input min="0" type="number" id ="imp5pg003q10c_2" class="lineinput" placeholder="?" />