Think about making eight. Find the missing numbers.
The missing number plus one equals eight. Three plus the missing number equals eight. We can use counters to help us. What do we need to add to one to make eight? One, two, three, four, five, six, seven. Seven plus one equals eight.
Now we need to work out what we should add to three to make eight. One, two, three, four, five. Three plus five equals eight. The missing numbers are seven and five.