Estimation & Rounding
3500
74 x 8
592
86 ➗7
12 r2
What is the value of the 7 in 34,746,800?
seven hundred thousand
What property states that the number zero added to any number equals that same number?
Identity Property of Addition
Find the estimated sum. 3,809 + 1,980
6,000
244 x 5
1220
845 ➗5
169
8 x 10,000
80,000
2 addends can be arranged in either order and have the same sum. What property is this?
The Commutative Property of Addition
Round 3,599,030 to the nearest hundred thousand.
3,600,000
309 x 9
2781
85 ➗3
28 r2
50,000
456 + 538 = ____ + 456
Which property can you use to find the unknown value?
The Commutative Property of Addition
Estimate the quotient. Remember to use compatible numbers instead of rounding.
7100 ➗8
900
746 x 6
4476
821 ➗3
273 r2
What is the standard form of 500,000 + 30,000 + 70 + 6?
530,076
3 addends can be grouped in any way and will have the same sum. Which property is this?
Associative Property of Addition
Round 47,036,788 to nearest million.
47,000,000
847 x 7
5929
649 ➗4
162 r1
What is 100 times more than 70,000?
7,000,000
Which property can be used to find the missing addend?
67 + (90 + 45) = (67 + __ ) + 90
The Associative Property of Addition