(20 x 30) x ___ = 20 x (30 x 60)
10
40
60
50
5 x 6 x 7 =
210
200
180
202
(61 x 15) x 12= 61 x ( ___ x 12)
14
15
12
A chocolate box contains 100 chocolates. How many chocolates are in 10 boxes?
1010
1001
1000
1100
5721 x 2345 = 2345 x _______
2346
5722
5721
2349
24 x 10 =
24
241
240
2400
11 hours = _______ minutes
660
160
110
How many articles are there in 12 dozens?
144
140
1x ____ = 90
99
98
100
90
8 x 9 x 10 =
72
702
720
80
