- , .
1 | = 24 | ||
1 = | 60 | ||
1 | = 60 | ||
1 = | 10 | ||
1 = | = 10 | ||
1 = | 100 | ||
1 = | 1000 | ||
1 | = 100 | ||
1 | = 10 | ||
1 = | 1000 | ||
1 | = 1000 | ||
8 8 = □ 8 8 = □ 8 8 = □
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90-x = 810 x- 400 = 700 x:45 = 3
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