Ответ:
- а) 83 − 39 = 44; 44 : 4 = 11; 11 · 7 = 77; 77 + 23 = 100.
- б) 94 − 19 = 75; 75 : 25 = 3; 3 · 15 = 45; 45 + 55 = 100.
- в) 47 + 25 = 72; 72 : 18 = 4; 4 · 12 = 48; 48 − 19 = 29.
- г) 71 + 19 = 90; 90 : 15 = 6; 6 · 13 = 78; 78 − 28 = 50.
- д) 46 + 18 = 64; 64 : 16 = 4; 4 · 25 = 100; 100 − 50 = 50.
