Multiply by multiples of 10
40 x 8 =
320
6 x 28 =
180
57 x 6 =
342
28
x 2
-----
16
40
-------
56
9 x 14 =
(9 x 10) + (9 x 4)=
126
90 x 90 =
8,100
3 x 772 =
2,400
3 x 772 =
2,316
314
x 4
____
16
40
1200
------
1,256
8 x 178 =
(8 x 100) + (8 x 70) + (8 x 8) =
1,424
40 x 50 =
2,000
84 x 93 =
7,200
5 x 123 =
615
5512
x 5
______
10
50
2500
25000
-------- 27,560
4 x 1,762 =
(4x1,000)+(4x700)+(4x60)+(4x2)=
7,048
12 x 100 =
1,200
8 x 519 =
4,000
8 x 178 =
1,424
6543
x 8
____
24
320
4000
48000
________ = 52,344
6 x 4,135 =
(6x4,000)+(6x100)+(6x30)+(6x5)=
24,810
7 x 400 =
2,800
7 x 6,938 =
49,000
7 x 6,938 =
48,566
8989
x 9
______
81
720
8100
72000
______ = 80,901
7 x 6,938 =
(7x6,000)+(7x900)+(7x30)+(7x8)=
48,566