Номер 591

5 • 100 = 500;
7 • 100 = 700;
9 • 100 = 900;
10 • 8 = 80;
100 • 4 = 400;
100 • 6 = 600;
9 • 100 - 260 = 900 - 260 = 640;
40 : 10 + 167 = 4 + 167 = 171;
40 • 10 + 130 = 400 + 130 = 530;