Rules of Addition
150+300- k =250
What does the 'k' represent in this equation
What is the unknown
37-?=37
0
10 less then 221
211
Round 59 to the nearest 10
60
9824+349
10,173
150+300-22= ?
What does the question mark symbolize in this equation
The unknown
What is the unknown
25-?=0
25
10 more then 45,301
45,311
Round 684 to the nearest hundred
700
650+250=
800
What rule of addition is
(5+2)+3=5+ (2+3)
Associative Property of Addition
When you substract 0 from any number, the result is always _____
the number
8,901/8,911/8,921
What is the next number in the pattern
8,931
58,713 Rounds to what number?
60,000
Solve 738+56 by rounding
740+54=794
What rule of addition is
4+1=1+4
Commutative Property of Addition
What is the subtraction rule for
22-0=22
When you subtract 0 from any number, the result is the number
10,000 less then 12,846
2,846
What is the difference?
15,000-8,000
7,000
Add:8346+7208
Then check by estimating
15,544
Estimating: 8,000+7,000=15,000
What rule of addition is
8+0=0
Identify Property of Addition
What is the subtraction rule for
16-16=0
When you subtract any number from itself the result is 0
What is the pattern?
959,987/969,987/979,987
10,000 more
7,930-4,623
3,307
Add: 743,980+211,315
Then check by estimating
955,295
Estimate: 740,000+211,000=951,000