Math Checkpoint 1 Understanding Place Value and Rounding

Remember that the tens place is 10 times the value of the ones place.

The hundreds place is 10 times the value of the tens place.

THe thousands place is 10 times the value of the hundreds place, and on and on.

"10 times" means bigger/greater than.

On the other hand, $$\frac{1}{10}$$ means a place value is 10 times SMALLER/LESS THAN. SO, the ones place is $$\frac{1}{10}$$ the value of the tens place.

Remember that expanded notation is JUST another way to show you a digit's place value.

If they say "6 x 0.1" they really mean "A digit 6 in the tenths place".

If they say "5 x 100" they really mean "A digit 5 in the hundreds place".

PLEASE be careful with your tenTHS and hundredTHS. DO NOT confuse them with the Tens and Hundreds places.

Your 50/50 guess should have been between the two number lines that show Point R PASSING the number 3; you should have eliminated the other two choices as they have not passed the number 3 on the number line.

Now, once you have your 50/50, look at the number lines carefully; if the decimal is at 97 hundredths, that means it is SUPER close to reaching the 4 on the number lines as you almost have one whole. That means, the correct number line should be the one that shows Point R positioned really close to the number 4.

In this problem, you are comparing decimals, You are looking for any of the statues that are more than 1.3 (one and three TENTHS OR one and thirty HUNDREDTHS) AND that are less than 1.7 (one and seven TENTHS OR one and seventy HUNDREDTHS).

Statue A measures 1.03 (one and three HUNDREDTHS. This decimal is too small and has not even reached the 1.3 that is required.

Statue B measures 1.35 (one and thirty-five hundredths). Now, DON'T be distracted by the fact that this decimal is in the hundredths place. Remember that 1.3 also has the same value as 1.30, so Statue B is part of your answer.

Statue C measures 1.8 or 1.80, which is TOO much! Our answer has to fall under 1.7 or 1.70.

Statue D measures 1.68 (one and sixty-eight hundredths). This is also part of our answer.