Express 70 as the product of primes.
10 x 7
2 x 35
14 x 15
2 x 5 x 7
All the factors of 9 are
1, 9
1, 3, 9
9, 9
3, 9
L C M of 3 and 5 is
3
5
15
1
All the factors of 45 are
1, 3, 5, 9, 15, 45
3, 5, 9, 15, 45
1, 3, 5, 9, 15
3, 5, 9, 15
Use this number line add (-1) and (+7)
-8
-6
+8
+6
If m+n = 7, and m=+5. Find the value of n.
+1
+5
-2
+2
(+15)÷(+3) =
+45
+3
-3
The prime factors of 20 are
1, 2, 5
2, 4, 5
1, 2, 4, 5
2, 5
The prime factors of 15 are
1, 3, 5
1, 3, 5, 15
3, 5
Use this number line find the value of (-4) +(-4)+ (+6).
