Remember: Interest is the extra coins a bank garden adds for keeping your coins there. This garden is made up, and your real credits never earn interest.
Read and answer
Read the story first, then answer.
Ana and the Bank GardenAna had saved one hundred pretend coins. She wanted them safe, and she wanted them to grow, so she took them to the Bank Garden, a pretend place made up for this story. A bank keeps coins safe. The garden adds a little extra to coins left there, and that extra is called interest. In this garden, interest was one new coin for every ten coins. After one year the garden added ten coins, so Ana had one hundred ten. In year two the garden held eleven tens, so it added eleven coins, and Ana had one hundred twenty-one. Ana did nothing but wait. The garden is made up, so the numbers are easy. Real banks use different numbers.
1
The garden adds one new coin for every ten coins. How many new coins do 100 coins add in a year?
1 coin10 coins100 coins
2
After year one Ana has 100 + 10 = coins.
3
Look at the table. In year two, 110 + 11 = coins at the end.
4
Year two added more than year one because the ten new coins earned interest too.
TrueFalse
5
A garden holds 30 coins, in three rows of ten. It adds new coins in a year.
Join, fix and think
6
Circle every coin that is interest.
The ten new coins after year oneThe hundred coins Ana plantedA coin Gran gave AnaThe eleven new coins after year twoA coin found on the path
7
Join each one to what it is.
1Interest
2A bank
3The hundred planted coins
Aa place that keeps coins safe
Bthe extra coins the garden adds
CAna's own coins, not interest
8
Fix the mistake: Ana says all 110 coins are interest.
TrueFalse
9
The Bank Garden is made up, and real banks use different numbers.
TrueFalse
10
Put Ana's story in order, first to last.
Year two: the garden adds 11 coins
Ana leaves her coins in the Bank Garden
Ana saves 100 coins
Year one: the garden adds 10 coins
11
Ana ends with 121 coins. 121 − 100 = coins came from interest.
12
Ask a grown-up how interest works at a real bank. Write one thing they tell you.
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Answer key · Set A
What is interest?
110 coins One hundred is ten tens, so the garden adds ten coins.
2110 One hundred plus the ten new coins make one hundred ten.
3121 The 110 coins are eleven tens, so 11 new coins came. 110 + 11 = 121.
4True The ten new coins joined the hundred, and all of them earned interest.
53 Thirty coins are three tens, and each ten adds one new coin.
6The ten new coins after year one, The eleven new coins after year two Interest is the extra coins the garden adds. Coins Ana planted, a gift and a found coin are not interest.
71-B, 2-A, 3-C Interest is the extra the garden adds, a bank keeps coins safe, and the planted coins are Ana's own.
8False Only the 10 new coins are interest. The other 100 are the coins Ana planted herself.
9True The garden is made up for the story, so the numbers are easy. A grown-up can tell you more.
104, 2, 1, 3 Ana saved, left the coins in the garden, and then waited as it added 10 coins and then 11.
1121 The garden added 10 coins and then 11 coins, and 10 + 11 = 21.
12Your own words: a grown-up reads it.
Mark each answer, count the right ones and write the score on the sheet.