Add 2-Digit and 1-Digit Numbers (Equation)
1st Grade Math practice: 21 + 7 = . Part of 2-digit addition: no regrouping (2-Digit Addition: No Regrouping).
~9 min
When you add 42 + 6, add the ones (2 + 6 = 8) and keep the tens the same (4 tens). The answer is 48.

