\[\boxed{\mathbf{1.}\mathbf{3}}\]
\[\mathbf{Вычисления\ с\ помощью\ }\]
\[\mathbf{калькулятора.}\]
\[\textbf{а)}\ 57,513 + 48,322 = 108,835\]
\(470,97 + 2078,65 = 2549,62\)
\[0,0687 + 0,0687 = 0,1374\]
\[0,0687 + 0,93138 = 1,00008\]
\[34\ 809\ 476 + 47\ 283\ 045 =\]
\[= 82\ 092\ 521\]
\[\textbf{б)}\ 87,756 - 54,627 = 33,129\]
\[687,158 - 493,307 = 193,851\]
\[0,14254 - 0,09821 = 0,04433\]
\[89\ 481\ 077 - 27\ 692\ 008 =\]
\[= 61\ 789\ 069\]
\[\textbf{в)}\ 22,36 \cdot 79,25 = 1772,03\]
\[3,896 \cdot 2,409 = 9,385464\]
\[0,3426 \cdot 0,372 = 0,1274472\]
\[0,0455 \cdot 3,486 = 0,158613\]
\[\textbf{г)}\ 12,661696\ :2,368 = 5,347\]
\[695,48814\ :27,403 = 25,38\]
\[662\ 418,\ 24\ :926,2 = 715,2\]