Ответы к учебнику по математике за 2 класс 1 часть Рудницкая. Окружность, ее центр и радиус. Номер №21

Выполни действия, записывая числа столбиком.
68 + 24
42 + 58
73 + 16
19 + 27
52 + 9
64 + 7
8 + 92
4 + 49
64 − 17
85 − 58
51 − 44
77 − 69
50 − 16
70 − 43
90 − 8
63 − 4

Ответ

68 + 24 = 92
42 + 58 = 100
73 + 16 = 89
19 + 27 = 46
52 + 9 = 61
64 + 7 = 71
8 + 92 = 100
4 + 49 = 53
64 − 17 = 47
85 − 58 = 27
51 − 44 = 7
77 − 69 = 8
50 − 16 = 34
70 − 43 = 27
90 − 8 = 82
63 − 4 = 59
Вычисления:

$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}68\\ 24\end{array}}\\ \begin{array}{r}92\end{array}\end{array}$

$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}42\\ 58\end{array}}\\ \begin{array}{r}100\end{array}\end{array}$

$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}73\\ 16\end{array}}\\ \begin{array}{r}89\end{array}\end{array}$

$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}19\\ 27\end{array}}\\ \begin{array}{r}46\end{array}\end{array}$

$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}52\\ 9\end{array}}\\ \begin{array}{r}61\end{array}\end{array}$

$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}64\\ 7\end{array}}\\ \begin{array}{r}71\end{array}\end{array}$

$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}8\\ 92\end{array}}\\ \begin{array}{r}100\end{array}\end{array}$

$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}4\\ 49\end{array}}\\ \begin{array}{r}53\end{array}\end{array}$

$\begin{array}{r}\begin{array}{r}—\end{array}\underline{\begin{array}{r}64\\ 17\end{array}}\\ \begin{array}{r}47\end{array}\end{array}$

$\begin{array}{r}\begin{array}{r}—\end{array}\underline{\begin{array}{r}85\\ 58\end{array}}\\ \begin{array}{r}27\end{array}\end{array}$

$\begin{array}{r}\begin{array}{r}—\end{array}\underline{\begin{array}{r}51\\ 44\end{array}}\\ \begin{array}{r}7\end{array}\end{array}$

$\begin{array}{r}\begin{array}{r}—\end{array}\underline{\begin{array}{r}77\\ 69\end{array}}\\ \begin{array}{r}8\end{array}\end{array}$

$\begin{array}{r}\begin{array}{r}—\end{array}\underline{\begin{array}{r}50\\ 16\end{array}}\\ \begin{array}{r}34\end{array}\end{array}$

$\begin{array}{r}\begin{array}{r}—\end{array}\underline{\begin{array}{r}70\\ 43\end{array}}\\ \begin{array}{r}27\end{array}\end{array}$

$\begin{array}{r}\begin{array}{r}—\end{array}\underline{\begin{array}{r}90\\ 8\end{array}}\\ \begin{array}{r}82\end{array}\end{array}$

$\begin{array}{r}\begin{array}{r}—\end{array}\underline{\begin{array}{r}63\\ 4\end{array}}\\ \begin{array}{r}59\end{array}\end{array}$