Two Digit by Two Digit Multiplication
12 X 20
What is 240
98 X 1
What is 98
What does Place Value mean?
The value of a number of a digit in a number
34 X 30
What is 1020
45 X 3
What is 135
If I estimate, I am....
rounding!!!!
54 X 20
What is 1080
72 X 6
What is 432
ESTIMATE: 42 x 38
40 x 40
47 X 60
What is 2820
ESTIMATE USING COMPATIBLE NUMBERS:
21 x 24
20 x 25
87 X 90
What is 7830
39 X 8
What is 312
What are compatible numbers?
Numbers that are easy to multiply and are close to the actual number