Rounding to the nearest 10
Decide if each of the following is true or false:
494 rounded to the nearest ten is 490
TRUE
Decide if each of the following is true or false:
151 rounded to the nearest hundred is 150
FALSE
Solve the problem:
What is 152 + 236?
388
Solve the problem:
893-232
661
What is a sum?
The answer to an addition equation.
Decide if each of the following is true or false:
307 rounded to the nearest ten is 300
FALSE
What is 172 rounded to the nearest hundred?
200
Solve the problem:
What is 222 + 498?
720
Solve the problem:
750-684
66
What is a difference?
The answer to a subtraction equation.
Which of the following numbers round to 760 when rounded to the nearest ten? Choose all the correct answers.
A. 755
B. 763
C. 744
D. 767
E. 759
A. 755
B. 763
E. 759
What is 24 rounded to the nearest hundred?
Solve the problem:
What is 823 + 266?
1,089
Solve the problem:
512 - 232?
280
What does it mean to round?
To find a number that is close in value by finding the nearest ten or hundred.
Making an estimate.
What two tens does 263 fall between?
260
270
What two hundreds does 254 fall between?
200
300
Amy scores 199 points bowling. Alice scores 164 points bowling. How many points do they score in all?
363
Alex made $545 from mowing laws. He buys a new leaf blower for $386. How much money does he have left?
$159
What is place value?
The value of a digit based on it's position within number. (ones, tens, hundreds)
What two tens does 694 fall between?
690
700
What is 1,543 rounded to the nearest hundred?
1,500
The sum of the equation below is written using hundreds, tens, and ones. Complete the equation.
237 + 386= _____ hundreds + 11 tens +____ ones
5 hundreds + 11 tens + 13 ones
The difference of the equation below is written using hundreds, tens, and ones. Complete the equation.
416-298= 1 hundred + ____ tens +____ ones
1 hundred + 1 ten + 8 ones
What strategies can you use when adding and subtracting 3 digit numbers?
Base 10 blocks
Place value chart
Expanded form
Number line