0, 1
ab x 0 = ?
0
784 x 10 =?
7840
24x2 =?
(Double)
48
60x3 =?
(Use 60=6x10 to help you)
11x9 =?
99
cd x 1 =?
cd
How many 5's in 125 ?
25
13x4 =?
(Double and double again)
52
32x3 =?
(Double 32 and one more)
96
126 x 9 =?
(You can use 9 = 10 - 1 to help you:
126x10 - 126x1 =?)
1134
300 x 50,000 = ?
15,000,000
8x5 + 4x5 - 12x5 =?
0
20x17 = ?
(You can use 20=2x10 to help you)
340
How many 3' in 72?
24
How many 9's in 135?
15
80 x 1 - 732 x 0 + 89 x 10 =?
970
78 x 15 = ?
(You can use 78x10 + 78x5)
(And 5 is half of 10)
1170
How many 4's in 56?
14
79x3 - 48x4 + 48=?
(48 can be rewrite 48x1 to help you)
93
22x9 + 18x3 + 18x6 =?
(You can use Associative property to help you:
18x3 + 18x6 = 18 x (3+6)
(22+18) x 9 = 40x9
= 360
(89+13-65)x0 + (97-43+16)x1 - (27+9-13)x0 = ?
8x10 + 7x5 + 9x15 = ?
(Rewrite: 9x15 = 9x(10+5) = (9x10 + 9x5)
=> 8x10 + 7x5 + 9x10 + 9x5
(8x10 + 9x10 + 7x5 +9x5)
10x(8+9) + 5x(7+9)
=10x17 + 5x16
= 170 + 80
= 250
48x2 + 20x4 - 24x2 = ?
(You can use commutative property to help you)
128
Daniela and Laylany have total 84 videos. Daniela's videos are 3 times more than Laylany's videos. How many videos each person has?
Daniella's videos: 63
Laylany's videos: 21
41x9 - 21x9 - 10x9 = ?
(You can use Distributive property to help you)
(41 - 21 - 10) x9
=10 x 9
=90