Выразите.
а)400 мм,200 мм,70 мм в дециметрах,в сантиметрах ;
б)120 см,240 см,930 см в дециметрах.


Вычислите.
700:100
800:10
900:0

4*100
100*4
12*10

48:24*100
900:(88+12)
500:(50:10)

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