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Математика 2 класс М.И.Моро, М.А,Бантова, Г.В.Бельтюкова, С.И.Волкова, С.В.Степанова

Математика 2 класс М.И.Моро, М.А,Бантова, Г.В.Бельтюкова, С.И.Волкова, С.В.Степанова

авторы: , , , , , .
издательство: "Просвещение" 2014

Раздел:

Номер №3

Используя числа 10, 9, 1, знаки "+", "−" и скобки, составь различные выражения и найди их значения.

Решение

1 + 9 + 10 = 10 + 10 = 20
(1 + 9) + 10 = 10 + 10 = 20
1 + (9 + 10) = 1 + 19 = 20
1 + 910 = 1010 = 0
(1 + 9) − 10 = 1010 = 0
1 + 10 + 9 = 11 + 9 = 20
(1 + 10) + 9 = 11 + 9 = 20
1 + (10 + 9) = 1 + 19 = 20
1 + 109 = 119 = 2
(1 + 10) − 9 = 119 = 2
1 + (109) = 1 + 1 = 2
1 − (109) = 11 = 0
9 + (101) = 9 + 9 = 18
9 − (101) = 99 = 0
10 + 9 + 1 = 19 + 1 = 20
(10 + 9) + 1 = 19 + 1 = 20
10 + (9 + 1) = 10 + 10 = 20
109 + 1 = 1 + 1 = 2
10 + 91 = 191 = 18
(109) + 1 = 1 + 1 = 2
10 − (9 + 1) = 1010 = 0
(10 + 9) − 1 = 191 = 18
10 + (91) = 10 + 8 = 18
1091 = 11 = 0
9 + 1 + 10 = 10 + 10 = 20
(9 + 1) + 10 = 10 + 10 = 20
9 + (1 + 10) = 9 + 11 = 20
91 + 10 = 8 + 10 = 18
9 + 110 = 1010 = 0
(91) + 10 = 8 + 10 = 18
(9 + 1) − 10 = 1010 = 0
9 + 10 + 1 = 19 + 1 = 20
(9 + 10) + 1 = 19 + 1 = 20
9 + (10 + 1) = 9 + 11 = 20
9 + 101 = 191 = 18
(9 + 10) − 1 = 191 = 18
(109) − 1 = 11 = 0
10 − (91) = 108 = 2
10 + 1 + 9 = 11 + 9 = 20
(10 + 1) + 9 = 11 + 9 = 20
10 + (1 + 9) = 10 + 10 = 20
101 + 9 = 9 + 9 = 18
10 + 19 = 119 = 2
(101) + 9 = 9 + 9 = 18
10 − (1 + 9) = 1010 = 0
(10 + 1) − 9 = 119 = 2
1019 = 99 = 0
(101) − 9 = 99 = 0