1.
Find the product.
A.
45
B.
36
C.
40
D.
54
Hint
2.
Find the product.
A.
90
B.
1
C.
0
D.
9
Hint
3.
Find the product.
9 × 7
A.
72
B.
70
C.
63
D.
64
Hint
4.
Find the product.
1 × 9
A.
0
B.
9
C.
1
D.
19
Hint
5.
How can patterns help you when multiplying by 9?
A.
The sum of the two digits in the product is always a multiple of 7.
B.
The last digit of the product is always 9.
C.
The last digit of the product is always 8 or 9.
D.
Going from
9 × 1 to 9 × 10, the sum of the two digits in the product is always 9.
Hint