Stage 2 · Unit 30 / 44 · Numbers & Operations
Two-digit addition
Add the ones, then the tens. Solve no-carry addition in columns too.
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Tens plus ones
For 20 + 4, add the ones 0 and 4, then write the tens digit 2.
Tens and ones plus ones
· Not the suggested orderTens plus tens
· Not the suggested orderAdd the ones
In column math, start with the ones.
· Not the suggested orderAdd the tens
· Not the suggested orderAdd in columns
· Not the suggested orderTwo-digit plus two-digit
· Not the suggested orderAddition stories
· Not the suggested orderAbout Two-digit addition practice
“Two-digit addition” is unit 30 of Stage 2, for ages 7–8, in numbers & operations. Add the ones, then the tens. Solve no-carry addition in columns too.
Its steps are: Tens plus ones, Tens and ones plus ones, Tens plus tens, Add the ones, Add the tens, Add in columns, Two-digit plus two-digit, Addition stories. Each step has 10 problems and is free with no sign-up. 90% or better earns three stars.