0
Q
7x3+6x3 =
A
(7+6)x3
1
Q
(6+8)x2 =
A
6x2+8x2
2
Q
8x2-6x2 =
A
(8-6)x2
3
Q
3x5-1x5 =
A
(3-1)x5
4
Q
4x(3-1) =
A
4x3-4x1
5
Q
(2+3)x5 =
A
2x5+3x5
6
Q
7 x 93 =
A
7 x ( 90 + 3 )
= 7 x 90 + 7 x 3
= 630 + 21
= 651
7
Q
6 x 77 =
A
6 x ( 70 + 7 )
= 6 x70 + 6x7
= 420 + 42
= 462
8
Q
94 x 5 =
A
(90+4)x5
= 90x5+4x5
=450+20
=470
9
Q
7x80
A
560
10
Q
7x800
A
5600
11
Q
7x8,000
A
56,000
12
Q
70x80
A
5,600
13
Q
60x30
A
1,800
14
Q
300x600
A
180,000
15
Q
40x20
A
800
16
Q
150x2
A
300
17
Q
150x20
A
3,000
18
Q
150x200
A
30,000
19
Q
99x5 =
A
(100-1)x5
=500-5
=?
20
Q
96x7
A
= (100-4)x7
=100x7 - 4x7
= 700 - 28
= 672
21
Q
16x9=
A
16x(10-1)
=16x10-16x1
=160-16
=144
Barack 4th Grade
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