First, round the numbers to the nearest whole number. Then estimate the sum.<hr> 2.87 + 3.4 = <input min="0" type="number" id ="imp4pg181q7a_1" class="lineinput" placeholder="?" /> + <input min="0" type="number" id ="imp4pg181q7a_2" class="lineinput" placeholder="?" /> <br> = <input min="0" type="number" id ="imp4pg181q7a_3" class="lineinput" placeholder="?" />