12月份
1.
A farmer had 17 sheep. All but 9 died. How many live
sheep are left?
2. Some months have 30 days, some months have 31 days.
How many months have 28 days?
3. Divide 30 by half and add 10. What do
you get?
答案
1. 9 sheep.
2. All of them. Every month has at least 28 days.
3. 70. Dividing by half is the same as multiplying by 2.
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