Prime and Composite
only has two unique factors, one and itself
what is a multiple?
A number said when skip counting by a certain number (ex: 24 is a multiple of 2)
true or false
10,000 is 100 times as much as 100
TRUE!
round 103, 963 to the nearest THOUSAND
(hint think if it is closer to 103,000 or 104,000 then round to that number)
104,000
Use doubles strategy to multiple 32 x 8
256
what is a composite number?
has more than two unique factors
choose the number that is not a factor of 28
28, 12, 14, 7
Fill in the blank using 10, 100, 1,000, 10,000
1,000 is ___ times as much as ten
Round 26, 343 to the nearest 100
26, 300
10 x 18
show your thinking
180
which numbers are prime number:
9, 5, 41, 24
5 and 41
1.) 48, 8, 16, 72
2.) 16, 32, 28, 64
3.) 21, 16, 32, 80
4.) 24, 42, 12, 54
4.) 24, 42, 12, 54
Draw beads to show 206, 139 on the abacus
Whiteboard answer
use standard algorithm to add 4,865 and 43,954
48,819
choose the thinking that would help you calculate 9 x 26
1.) 10 x 9 - 1 x 26
2.) 10 x 26 + 1 x 26
3.) 5 X 26 + 1 X 26
4.) 10 X 26 - 1 X 26
10 x 26 - 1 x 26
choose the composite number:
16, 41, 19, 23
41
choose the factors of 48
1.) 8 and 6
2.) 20 and 2
3.) 4 and 8
4.) 6 and 9
1.) 8 and 6
How would you write this number that is shown in expanded form?
700,000 + 20,000 + 80 + 3
720,083
what number has the second greatest value
780,000
780,569
780, 596
780, 659
780, 569
Show the thinking that could help you calculate 32 x 5
32 x 10 = 320
320 divided by 2 = 160
Is 42 a prime number?
(what are its factors)
NO!
7 X 6 , 21 X 2 , 14 X 3
choose the multiples of 24
1.) 3 and 7
2.) 6 and 4
3.) 13 and 2
4.) 20 and 4
2.) 6 and 4
there were three hundred forty-nine thousand six hundred ten people at the airport last month. How would this look represented as a number?
349,610
write the missing digit to make the total correct
43, __ 86 + 39, 473
5
45 x 5
must use a 10s strategy
45 x 10 = 450
450 divided by 2 = 225