Вычислите (по цепочке):
а) 450 → ⋅ 2 ⋯ → − 250 ⋯ → : 13 ⋯ → ⋅ 7 ? 450 \xrightarrow{\cdot 2} \dots \xrightarrow{-250} \dots \xrightarrow{:13} \dots \xrightarrow{\cdot 7} ? 450 ⋅ 2 ⋯ − 250 ⋯ : 13 ⋯ ⋅ 7 ?
б) 364 → + 116 ⋯ → : 6 ⋯ → + 70 ⋯ → ⋅ 8 ? 364 \xrightarrow{+116} \dots \xrightarrow{:6} \dots \xrightarrow{+70} \dots \xrightarrow{\cdot 8} ? 364 + 116 ⋯ : 6 ⋯ + 70 ⋯ ⋅ 8 ?
в) 200 → ⋅ 5 ⋯ → − 250 ⋯ → : 150 ⋯ → ⋅ 12 ? 200 \xrightarrow{\cdot 5} \dots \xrightarrow{-250} \dots \xrightarrow{:150} \dots \xrightarrow{\cdot 12} ? 200 ⋅ 5 ⋯ − 250 ⋯ : 150 ⋯ ⋅ 12 ?
г) 480 → : 20 ⋯ → + 80 ⋯ → : 4 ⋯ → ⋅ 20 ? 480 \xrightarrow{:20} \dots \xrightarrow{+80} \dots \xrightarrow{:4} \dots \xrightarrow{\cdot 20} ? 480 : 20 ⋯ + 80 ⋯ : 4 ⋯ ⋅ 20 ?
д) 300 → − 40 ⋯ → : 13 ⋯ → ⋅ 10 ⋯ → : 20 ? 300 \xrightarrow{-40} \dots \xrightarrow{:13} \dots \xrightarrow{\cdot 10} \dots \xrightarrow{:20} ? 300 − 40 ⋯ : 13 ⋯ ⋅ 10 ⋯ : 20 ?
а) 450 ⋅ 2 = 900 − 250 = 650 : 13 = 50 ⋅ 7 = 350 450 \cdot 2 = 900 - 250 = 650 : 13 = 50 \cdot 7 = 350 450 ⋅ 2 = 900 − 250 = 650 : 13 = 50 ⋅ 7 = 350
б) 364 + 116 = 480 : 6 = 80 + 70 = 150 ⋅ 8 = 1200 364 + 116 = 480 : 6 = 80 + 70 = 150 \cdot 8 = 1200 364 + 116 = 480 : 6 = 80 + 70 = 150 ⋅ 8 = 1200
в) 200 ⋅ 5 = 1000 − 250 = 750 : 150 = 5 ⋅ 12 = 60 200 \cdot 5 = 1000 - 250 = 750 : 150 = 5 \cdot 12 = 60 200 ⋅ 5 = 1000 − 250 = 750 : 150 = 5 ⋅ 12 = 60
г) 480 : 20 = 24 + 80 = 104 : 4 = 26 ⋅ 20 = 520 480 : 20 = 24 + 80 = 104 : 4 = 26 \cdot 20 = 520 480 : 20 = 24 + 80 = 104 : 4 = 26 ⋅ 20 = 520
д) 300 − 40 = 260 : 13 = 20 ⋅ 10 = 200 : 20 = 10 300 - 40 = 260 : 13 = 20 \cdot 10 = 200 : 20 = 10 300 − 40 = 260 : 13 = 20 ⋅ 10 = 200 : 20 = 10
Ответ: а) 350; б) 1200; в) 60; г) 520; д) 10.