Adding and Subtracting Choose the correct answer to the addition and subtraction problems below. Sara00 published on April 14, 2011 Stacked 1/10 30+20=? 30 40 50 60 2/10 40+40=? 100 110 80 90 3/10 25+25=? 25 50 75 100 4/10 40-10=? 10 50 30 20 5/10 100-20=? 100 70 90 80 6/10 60-30=? 10 20 30 40 7/10 10+11=? 21 30 27 38 8/10 500+500+1=? 1000 1001 1002 1011 9/10 200-1=? 198 299 300 199 10/10 Bonus Question:87+100+13+1=? 200 210 201 301