Math



Concepts

**__Concept__** Rounding Fact Families __Rounding__ Thousand,Hundred,Ten,One

When rounding a number you look at the digit to the right of the place value you want to round. For example, Round to the nearest Tens you would look at the digit in the ones place value. The same is true if you are rounding to the nearest hundreds you would look at the digit in the ten place value.

After you look at the digit in the correct place value you need to decide if it is in the first group or second. First group are the digits; 0,1,2,3,4 Second group are the digits; 5,6,7,8,9

After you decided which group the digit is in then you need to do the following. First group you round down Second group you round up

Examples: Round 1234 to the nearest ten. The answer is 1,230. Round 2345 to the nearest ten. The answer is 2,350. Round 1234 to the nearest hundred. The answer is 1,200 Round 5678 to the nearest hundred. The answer is 5,700 Round 1234 to the nearest thousand. The answer is 1,000 Round 5678 to the nearest thousand. The answer is 6,000

__Fact Family__

Each member in the fact family will use the same three numbers 1+2=3; 2+1=3; 3-1=2; 3-2=1