Luna Davies
03/02/2024 · High School
271. Ifodadagi umumiy ko'paytuvchini 3-namunaga ko'ra qavsdan tashqariga chiqarib, uning qiymatini toping: \( \begin{array}{lll}\text { a) } 81 \cdot 21+19 \cdot 21 ; & \text { b) } 252 \cdot 80-252 \cdot 70 & \text { d) } 201 \cdot 91+112 \cdot 91\end{array} \)
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Давайте решим каждое из выражений, вынеся общий множитель за скобки.
a) \( 81 \cdot 21 + 19 \cdot 21 \)
Общий множитель: \( 21 \)
Вынесем его за скобки:
\[
21 \cdot (81 + 19) = 21 \cdot 100 = 2100
\]
b) \( 252 \cdot 80 - 252 \cdot 70 \)
Общий множитель: \( 252 \)
Вынесем его за скобки:
\[
252 \cdot (80 - 70) = 252 \cdot 10 = 2520
\]
d) \( 201 \cdot 91 + 112 \cdot 91 \)
Общий множитель: \( 91 \)
Вынесем его за скобки:
\[
91 \cdot (201 + 112) = 91 \cdot 313 = 28483
\]
Таким образом, результаты:
a) \( 2100 \)
b) \( 2520 \)
d) \( 28483 \)
Quick Answer
a) \( 2100 \)
b) \( 2520 \)
d) \( 28483 \)
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