Краткий ответ
Упражнение 39:
- \(10\,000\)
- \(800\)
- \(900\)
- \(999\)
- \(900\)
- \(67\,001\)
- \(80\)
- \(50\,999\)
Упражнение 40:
- \(1\,000\)
- \(6\,340\,000\)
- \(2\,000\)
- \(39\,000\)
- \(100\,000\)
- \(10\,900\)
- \(780\,000\)
- \(7\,200\)
Решение
Сначала выполняем действия в скобках, затем умножение и деление слева направо, после этого сложение и вычитание.
Упражнение 39
\[ 5\,000\,000:1000+50\cdot100=5000+5000=10\,000 \]
\[ 36\,000\,000:1000:9:5=36\,000:9:5=4000:5=800 \]
\[ 5\,400\,000:1000:6=5400:6=900 \]
\[ 10\,000\,000:1000:10-1=10\,000:10-1=1000-1=999 \]
\[ (4\,900\,000-4\,000\,000):1000 =900\,000:1000=900 \]
\[ 67\,000\,000:100:10+1=670\,000:10+1=67\,000+1=67\,001 \]
\[ 8\,000\,000:1000:1000\cdot10 =8000:1000\cdot10=8\cdot10=80 \]
\[ 50\,000\,000:1000+999=50\,000+999=50\,999 \]
Упражнение 40
\[ 6\,800\,000:100:100+320=68\,000:100+320=680+320=1000 \]
\[ 340\cdot1000+6\,000\,000=340\,000+6\,000\,000=6\,340\,000 \]
\[ (1\,800\,000+200\,000):1000 =2\,000\,000:1000=2000 \]
\[ (30\,000\,000+9\,000\,000):1000 =39\,000\,000:1000=39\,000 \]
\[ 44\cdot1000+56\cdot1000 =(44+56)\cdot1000=100\cdot1000=100\,000 \]
\[ 109\cdot1000:10=109\,000:10=10\,900 \]
\[ 78\cdot100\cdot100=7800\cdot100=780\,000 \]
\[ 8\cdot9\cdot1000:10=72\cdot1000:10=72\,000:10=7200 \]
Проверка, например, для №40(5): \(44+56=100\), значит \(100\cdot1000=100\,000\).
