There the same thing they both weigh the same thing hope it helps and have a great day!
I would say that its pair 1 and 3
First, find the digit in the place you are rounding to. Look at the digit one place to the right. If the digit is less than 5, round down. If the digit is 5 or greater, round up.
For example: round 1.86 to the nearest tenth
Look at the tenth digit (8). The number to the right of it is 6. Since it’s above 5, round the 8 up to 9. So you would get 1.9.
If it was 1.84, since 4 is less than 5, you would not round the 8, and you would get 1.8
1 way : 10d + 2d
another way: 5d + 5d + 2d
I think that it would be a