Question

вычесли удобным способом (3+7)*5, (10+3)*6 ,(4+5)*9, (7+10)*4 (2+8)*7, (10+6)*5

Answer 1

(3+7)*5=50 (10+3)*6=78 (4+5)*9=81
1) 3+7=10 1)10+3=13 1) 4+5=9
2)10*5=50 2) 13*6=78 2) 9*9=81
(7+10)*4=68 (2+8)*7=70 (10+6)*5=80
1) 10+7=17 1) 2+8=10 1) 10+6=16
2)17*4=68 2) 10*7=70 2) 16*5=80

Answer 2

спсссссс