Adding two-digit numbers is like combining two groups of friends. Imagine you have 47 friends in one group and 69 friends in another group. To find out how many friends you have in total, you count the friends from each group separately. You count 4 tens from the first group and 6 tens from the second group, which gives you 10 tens. Then, you count the 7 ones from the first group and 9 ones from the second group, which gives you 16 ones. So, when you add the tens and ones together, you have 10 tens and 16 ones, which equals 116 friends in total!
(also: Subtracting two-digit numbers)
(also: Counting and making change with money)
(also: Measuring and converting units of length)
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