Show:
Patterns of Zeros
Estimation
Multiplying by 1-digit
Multiplying by 2-digits
Patterns
100
100 X 3
What is 300?
100
53 X 22
What is 1,000?
100
34 X 2
What is 68?
100
124 X 24
What is 2,976?
100
8,9,1,8,9,1,...
What is 8,9,1?
200
4,000 X 6
What is 24,000
200
37 X 13
What is 400?
200
85 X 5
What is 425?
200
208 X 74
What is 15,392?
200
1,2,4,8,16,32,...
What is the rule, 2 times the previous number?
300
2000 X 180
What is 360,000?
300
76 X 927
What is 72,000?
300
5 X 3,954
What is 19,770?
300
4,151 X 81
What is 336,231?
300
1,1,2,3,5,8,13,21,...
What is the Fibonacci Sequence?
400
300 X 15
What is 4,500?
400
1,682 X 73
What is 140,000?
400
2 X 5,473
What is 10,946?
400
307 X 197
What is 60,479?
400
3,12,48,192,...
What is 4 times the previous number?
500
3200 X 1200
What is 3,840,000?
500
32 X 89,075
What is 2,700,000?
500
34,253 X 6
What is 205,518?
500
4,143 X 305
What is 1,263,615?
500
4,11,32,95,...
What is the pattern multiply by 3 and subtract 1?