Powers of 10
20 x 100
2,000
20 x 20
400
15 x 2
30
14 x 12
168
Repeated addition is also called multiplication.
True
55 x 1000
55,000
30 x 200
6,000
22 x 7
154
30 x 28
840
8 x 5 = 10 x 4
True
97 x 10 000
970,000
90 x 200
18,000
51 x 3
153
52 x 21
624
42 x 53 is the same as (40 + 2) x ( 50 + 3)
True
135 x 1000
135,000
300 x 300
90,000
49 x 5
245
36 x 49
1,764
236 x 43 is the same as 124(53 x 38)
False
674 x 10, 000
6,740,000
400 x 500
200,000
78 x 6
468
63 x 85
5,355
Arrays are useful representations of multiplication concepts.
True