Mental Math
Number Properties
Distribute!
Multiply Whole Numbers
Powers of Ten
100
The product of 20 and 3
What is 60?
100
The property that tells us that 8 + 3 = 3 +8
What is the Commutative Property of Addition
100
How 3 x 13 could be written using the Distributive Property
What is 3 x 10 + 3 x 3? (30 + 9 = 39)
100
The product of 15 x 6
What is 90?
100
The product of 3.1 and 100
What is 310?
200
The quotient of 40 divided by 4
What is 10?
200
The property that tells us that 3 x 78 is the same as 3 x 70 + 3 x 8
What is the Distributive Property
200
How 6 x 31 could be written using the Distributive Property
What is 6 x 30 + 6 x 1 (or 180 +6 = 186)
200
The product of 23 and 14
What is 322?
200
The product of 34.01 and 10
What is 340.1?
300
The product of 3.2 and 10
What is 32?
300
The property that tells us that (a + b) + c = a + (b + c)
What is the Associative Property of Addition
300
How 4 x 28 could be written using the Distributive Property with addition.
What is 4(20 + 8) or 4 x 20 - 4 x 8 (that's 80 + 32 = 112)
300
The product of 45 and 12
What is 540?
300
The product of 0.04 and 100
What is 4?
400
The product of 0.7 and 2
What is 1.4?
400
The property that tells us that 1 times any number is equal to that number.
What is the Identity Property of Multiplication?
400
How 4 x 28 could be written using the Distributive Property with subtraction.
What is What is 4(30 -2) or 4 x 30 - 4 x 2 (that's 120 - 8 = 112)
400
The product of 345 and 67
What is 23,115?
400
The product of 692.64 and 1000
What is 692,640?
500
The product of 30 and 90
What is 2,700?
500
The property that tells us that 0 added to any number is equal to that number.
What is the Identity Property of Addition
500
How you could use the Distributive Property in two ways to find 9 x 19.
What is 9(10 + 9) or 9 x 10 + 9 x 9 or What is 9 (20-1) or 9 x 20 - 9 x 1?
500
The product of 910 and 21
What is 19,110?
500
The product of 54.78 and 100
What is 5,478?
M
e
n
u