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## Rounding four digit numbers?

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**Rounding four digit numbers?**We can use rounding to help estimate Sums and differences for problems Joining two parts to make the whole collection What do we know about the problem ? My sister had 1323 small blocks and 2136 large blocks. How many blocks did she have In her collection? What do we know about the numbers? addition Two four-digit numbers 2136 1323 How can we use rounding To help work out a reasonable Answer?**Round the numbers to**the nearest hundred! 2136 1323 + 2100 1300 + 400 3400 = 3000 +