Question

The weights of 3 students are 38.8 kg, 45.4 kg and 38.78 kg.
Which of the following is the correct increasing order of the weights?

• A. 38.8 kg < 45.4 kg < 38.78 kg
• B. 38.78 kg < 45.4 kg < 38.8 kg
• C. 38.78 kg < 38.8 kg < 45.4 kg
• D. 45.4 kg < 38.78 kg < 38.8 kg

Answer 1

The correct option is C 38.78 kg < 38.8 kg < 45.4 kg

When we compare the decimals numbers then we move from left side towards the right side.

In 38.8, it has 3 tens, 8 ones and 8 tenths.
In 45.4, it has 4 tens, 5 ones and 4 tenths.
In 38.78, it has 3 tens, 8 ones, 7 tenths and 8 hundredths.

So, 38.78 is the smallest number and 45.4 is the largest number.

Thus, 38.78 kg < 38.8 kg < 45.4 kg.