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10 questions
31×53=
84
83
154
153
43×105=
84
4015
148
153
343×45=
820
4015
1675
153
343×5=
820
475
1675
153
343×0,5=
820
475
4075
153
65×5%=
65×5=
612×5=
2612×0,5=
2612×482=
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