Частина 1. Номер 457
Виконай дії.
4 · 100 + 400 = 400 + 400 = 800;
3 · 100 – 200 = 300 – 200 = 100;
400 : 10 – 38 = 40 – 38 = 2;
800 : 20 + 80 = 40 + 80 = 120;
320 : 80 + 16 = 4 + 16 = 20;
160 · 5 – 100 = 800 – 100 = 700.
Виконай дії.
4 · 100 + 400 = 400 + 400 = 800;
3 · 100 – 200 = 300 – 200 = 100;
400 : 10 – 38 = 40 – 38 = 2;
800 : 20 + 80 = 40 + 80 = 120;
320 : 80 + 16 = 4 + 16 = 20;
160 · 5 – 100 = 800 – 100 = 700.