Карточка 1.
Круглые числа.
70 + 20 = 80 – 70 = 80 + 10 – 70 + 40 =
30 + 60 = 40 + 60 = 50 + 10 + 40 – 80 =
70 – 40 = 50 + 30 = 30 + 60 – 80 + 50 =
60 – 30 = 90 – 50 = 10 + 80 – 40 + 30 =
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Карточка 2.
Круглые числа.
50 + 10 = 90 – 60 = 70 + 20 – 60 +50 =
80 – 60= 70 + 30 = 60 + 10 + 30 – 40 =
40 + 50 = 50 – 20 = 30 + 50 – 80 + 90 =
60 – 30 = 100 – 10 = 20 + 40 + 30 – 10 =
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Карточка 3.
Круглые числа.
20 + 20 = 100 – 50 = 70 + 30 – 50 + 40 =
40 + 40 = 60 – 30 = 60 + 20 – 30 – 10 =
30 + 30 = 80 – 40 = 20 + 50 + 10 - 70 =
50 + 50 = 40 – 20 = 90 – 80 – 10 + 100 =
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Карточка 4.
Круглые числа.
60 + 40 = 30 + 40 = 90 + 10 – 60 – 30 =
90 – 60 = 20 + 70 = 70 – 20 -30 + 60 =
30 + 50 = 50 – 40 = 30 + 40 – 60 + 80 =
80 – 70 = 60 – 50 = 100 – 50 + 30 – 70 =