№ 93. Вычисли: 400 − 208; 504 − 398; 168 · 4; 168 : 4; 109 · 6; 205 · 4; 648 : 6; 927 : 9.

1. \(400-208=400-200-8=200-8=192\).
2. \(504-398=504-400+2=104+2=106\).
3. \(168\cdot4=(100+60+8)\cdot4=400+240+32=672\).
4. \(168:4=160:4+8:4=40+2=42\).
5. \(109\cdot6=100\cdot6+9\cdot6=600+54=654\).
6. \(205\cdot4=200\cdot4+5\cdot4=800+20=820\).
7. \(648:6=600:6+48:6=100+8=108\).
8. \(927:9=900:9+27:9=100+3=103\).

Ответ: 192; 106; 672; 42; 654; 820; 108; 103.