A)3007•9+7=27070
180007•5+2=900037
б)375•8+6=3006
9099•4+1=36397
в)25691•6+5=154151
40080•4+3=160323
1. х×60= 50400(сумма 6907 и 43493); х= 50400÷60
6907 х= 840
43493
*******
50400
2. 40450÷х=50(разность 7621 и 7571)
х= 40450÷50
х= 809
Конечно 12 !!!!!!!!!!!!!!!!!!!!!!!
-2, -1, 0, 1, 2, 3, 4
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!