Составь верные числовые равенства , используя данные числа 3. 5. 9. 4. 8 и 30. 50. 90. 40. 80
3+5=8 5+4=9 8+5=9+4 8-4=9-5 20+30=50 50+40=90 90-40=50 90-50=40 30+90=40+80 90-40=80-30
3+5 = 8; 5 = 8-3; 3 = 8-5; 5 = 9-4; 4 = 9-5; 4+5 = 9; 5-4 = 9-8; 9-5 = 8-4; 9-4 = 8-3; 3*(9-5) = 4+8;
30+50 = 80; 30 = 80-50; 50 = 80-30; 50 = 90-40; 40 = 90-50; 40+50 = 90; 50-40 = 90-80; 90-50 = 80-40; 90-40 = 80-30