Выполни сложение. (74 + 6) + 7 =; (27 + 3) + 5 =; (55 + 5) + 8 =; (32 + 8) + 4 =; (46 + 4) + 2 =; (61 + 9) + 6 =; (83 + 7) + 9 =; (38 + 2) + 3 =.

1. \((74+6)+7=80+7=\mathbf{87}\)
2. \((27+3)+5=30+5=\mathbf{35}\)
3. \((55+5)+8=60+8=\mathbf{68}\)
4. \((32+8)+4=40+4=\mathbf{44}\)
5. \((46+4)+2=50+2=\mathbf{52}\)
6. \((61+9)+6=70+6=\mathbf{76}\)
7. \((83+7)+9=90+9=\mathbf{99}\)
8. \((38+2)+3=40+3=\mathbf{43}\)

Ответ: 87, 35, 68, 44, 52, 76, 99, 43.