Round off the numbers to the nearest thousand. Then estimate its value. <br> 3280 + 1754 ≈ <br> <input min="0" type="number" id ="imp5pg003q9a_1" class="lineinput" placeholder="?" /> + 2000 <br>= <input min="0" type="number" id ="imp5pg003q9a_2" class="lineinput" placeholder="?" />