Multiply by Multiples of 10, 100, and 1,000
3 x 10
30
7 x 560
(7 x 500) + (7 x 60)
7 x 500 = 3,500
7 x 60 = 420
3,500 + 420 = 3,920
Break Apart to Solve!
24 x 4 x 2
24 x 2 = 48
48 x 4 = (40 x 4) + (8 x 4)
40 x 4 = 160
8 x 4 =32
160 + 32 = 192
2 x 4
8
3 x 100
3 x 1,000
300
3,000
10 x 120 = 1,200
or 6 x 100 = 600
or 10 x 100= 1,000
509 x 7
(500 x 7) + (9 x 7)
500 x 7 = 3,500
9 x 7 = 63
3,500 + 63 = 3,563
Break apart to solve:
5 x 18
5 x (9 x 2) =
5 x 2 = 10
10 x 9 = 90
20 x 40
800
40 x 9
360
4 x 2,610
4 x 3,000 = 12,000
7 x 86
7 x 80 = 560
7 x 6 = 42
560 + 42 = 602
4 x 506
2,000 + 24 = 2,024
324 x 5
20 + 100 + 1,500 =
1,620
8,000 x 3
24,000
538 x 3
5 x 1,242
(5 x 1,000) + (5 x 200) + (5 x 40) + (5 x 2)
5 x 1,000 = 5,000
5 x 200 = 1,000
5 x 40 = 200
5 x 2 = 10
5,000+1,000+200+10=6,210
404 x 6
(400 x 6) + (4 x 6) =
2,400 + 24 = 2,424
122 x 4
488
300 x 600
180,000
314 x 7
300 x 7 = 2,100
4 x 731
(4 x 700) + (4 x 30) + (4 x 1)
4 x 700 = 2,800
4 x 30 = 120
4 x 1 = 4
2,800 + 120 + 4 = 2,924
2 x 395
(2 x 300) + (2 x 90) + (2 x 5) =
600 + 180 + 10 = 790
4,176