1. How To Add Two Numbers Together • Write the numbers down with the • hundreds inline, • the tens in line • and the units inline. 347 + 146 hundreds 2. Add the units up. 7 + 6 = 13 As the answer is bigger than 10 Carry 10 and put the 3 in the answer box in the units column. tens units 347 + 146 493 1 • Add the tens up • 40 +40 = 80 • But we need to remember to add in the ten from the units put your answer in the tens column. 3 4. Add the hundreds up 300 + 100 = 400 put your answer in the hundreds column .