16+350:7-21 = 72: (17-8) + 5 = 49:7+18-9 = 98-6*4+17 = 630:7+40: (4*2) = 6*4: (560:70) * 5 = 85-6*8:4 = (26-6) * 5:4 = 7*4:2-8 = 54:9*7-20 = 420:7*8-24:6 = 47-30:5+7*7=

Вычислим выражения по действиям.

1) 16 + 350 : 7 - 21 = 16 + 50 - 21 = 66 - 21 = 45;

2) 72 : (17 - 8) + 5 = 72 : 9 + 5 = 8 + 5 = 13;

3) 49 : 7 + 18 - 9 = 7 + 9 = 16;

4) 98 - 6 * 4 + 17 = 98 - 24 + 17 = 74 + 17 = 91;

5) 630 : 7 + 40 : (4 * 2) = 90 + 40 : 8 = 90 + 5 = 95;

6) 6 * 4 : (560 : 70) * 5 = 24 : 8 * 5 = 3 * 5 = 15;

7) 85 - 6 * 8 : 4 = 85 - 48 : 4 = 85 - 12 = 73;

8) (26 - 6) * 5 : 4 = 20 * 5 : 4 = 100 : 4 = 25;

9) 7 * 4 : 2 - 8 = 28 : 2 - 8 = 14 - 8 = 6;

10) 54 : 9 * 7 - 20 = 6 * 7 - 20 = 42 - 20 = 22;

11) 420 : 7 * 8 - 24 : 6 = 60 * 8 - 4 = 480 - 4 = 476;

12) 47 - 30 : 5 + 7 * 7 = 47 - 6 + 49 = 42 + 49 = 91.