Round off the numbers to the nearest thousand. Then estimate its value. <br> 2704 + 6700 + 3819<br> ≈ <input min="0" type="number" id ="imp5pg003q9c_1" class="lineinput" placeholder="?" /> + <input min="0" type="number" id ="imp5pg003q9c_2" class="lineinput" placeholder="?" /> + <input min="0" type="number" id ="imp5pg003q9c_3" class="lineinput" placeholder="?" /> <br> = <input min="0" type="number" id ="imp5pg003q9c_4" class="lineinput" placeholder="?" />