Say What?
Mental Math
14 + 5 = ?
19
On paper
100 - 42
58
Mental Math
470 x 0=
Mental Math
3 x 20 =
60
There are 10 busses with 25 seats each. How many seats are there altogether.
250
7x7
49
On paper
68 - 39 =
29
On paper
10 x 13 =
130
MENTAL MATH
19 x 2=
38
James was multiplying 20 x 9. He decomposes it to make it easier to 10x (2x9) . Will he get the same answer and what is the answer ?
Yes. 180
Mental Math
6 x 9 =
18
On paper
562 +191
753
Mental Math
6 x 7 =
42
MENTAL MATH
12 x 6
72
How can you break apart 30x 8 into smaller parts?
(3x8) x 10 or 10x (3x8)
= 240
Mental Math
6x2
12
On paper
649-318
331
Mental Math
11 x 9 = ?
99
Mental Math
11 x 6 =
66
Johnny says that you can move the parenthesis in this equation and still get the same answer. Is he correct or incorrect
10+ (5 x 6 )= (10+5) x6
incorrect- you can only move p[parenthesis when the operations are the same.
On paper
17 x 10=
On paper
236-159
77
On paper
8 x 20 =
160
Mental Math
12 x 9 =
108
I represent any number and can be any letter, who am I?
variable