The correct option is
A 4.61 kg
Elizabeth buys some apples and oranges.
Weight of apples = 3.37 kg
Weight of oranges =1.24 kg
∴ Total weight of the purchse = (3.37 + 1.24) kg
We can use blocks, rods, and flats to represent hundredths, tenths and ones respectively, which are as follows:
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1190443/original_Screenshot_2021-06-18_at_6.26.21_PM.png)
Following this representation, 3.37 can be expressed as:
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1190447/original_Screenshot_2021-06-18_at_6.27.06_PM.png)
Similarly, 1.24 can be expressed as:
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1190449/original_Screenshot_2021-06-18_at_6.27.51_PM.png)
Now, to calculate 3.37 + 1.24, we write the decimals one below the other and add them as follows:
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1190450/original_Screenshot_2021-06-18_at_6.28.34_PM.png)
As we can see, the answer of the sum has 4 flats, 5 rods, and 11 blocks
But we can express 10 blocks as 1 rod.
So, 11 blocks can be expressed as:
11 blocks = (10 + 1) blocks
= 1 rod + 1 block
So, we observe:
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1190452/original_Screenshot_2021-06-18_at_6.29.22_PM.png)
Rearranging 11 blocks into 1 rod and 1 block, we get:
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1177572/original_Screenshot_2021-06-12_at_3.20.26_AM.png)
Counting the final number of flats, rods, and blocks, we get 4 flats, 6 rods, and 1 block.
∴ The total weight of the purchase
is
$4.61 kg.