Ten pages, two lessons. The first five pages teach regrouping the ones: think first, see the trade with blocks and a chart, decide "new ten or not", explain the trade and show what you know. The next five add the second trade: 10 tens make a hundred, worked one place at a time, then mixed sums and mistakes to find. Each lesson has its own teacher notes and answer keys.
Teach the lessons on separate days, starting each with its think-first page. Keep base-ten blocks out for both: the second lesson only works when students can see 10 tens become a flat. The teacher notes for each lesson list the misconceptions to expect and what secure work looks like.
Ask your child to say which places will trade before adding, and to show a trade with coins: ten pennies for a dime, ten dimes for a dollar.
This pack supports the following Common Core State Standards for Mathematics:
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The two regrouping lessons together: first sums where the ones make a new ten, then sums where the ones and the tens both trade. Students think before they add, use blocks, charts and the column method, explain each trade and find mistakes.
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