We had practised adding and subtracting 10 and 100 for homework, using methods that we learned last term. When adding ten, cover the units and add 1 to what you see. Then put the units back on the end. When adding 100, cover the tens and units, and add 1 to what you see. Then replace the tens and units at the end. This way makes it easy.
After that we compared numbers to see which was bigger. Always start with the biggest column. On the board above, the biggest column is the thousands column. If the biggest column is the same, look at the next column.
We had practised adding and subtracting 10 and 100 for homework, using methods that we learned last term. When adding ten, cover the units and add 1 to what you see. Then put the units back on the end. When adding 100, cover the tens and units, and add 1 to what you see. Then replace the tens and units at the end. This way makes it easy.
After that we compared numbers to see which was bigger. Always start with the biggest column. On the board above, the biggest column is the thousands column. If the biggest column is the same, look at the next column.
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