1) 819 ÷ 9 + 51 × 3 = 91 + 153 = 2442) 36 × 5 + 567 ÷ 7 = 180 + 81 = 2613) 6000 - (410 - 12 × 30) ÷ 35 = 6000 - (410 - 360) ÷ 35 = 6000 - 50 ÷ 35 = 6000 - 1.43 ≈ 5998.574) (20 × 19 + 220) ÷ 15 + 370 = (380 + 220) ÷ 15 + 370 = 600 ÷ 15 + 370 = 40 + 370 = 410
1) 819 ÷ 9 + 51 × 3 = 91 + 153 = 244
2) 36 × 5 + 567 ÷ 7 = 180 + 81 = 261
3) 6000 - (410 - 12 × 30) ÷ 35 = 6000 - (410 - 360) ÷ 35 = 6000 - 50 ÷ 35 = 6000 - 1.43 ≈ 5998.57
4) (20 × 19 + 220) ÷ 15 + 370 = (380 + 220) ÷ 15 + 370 = 600 ÷ 15 + 370 = 40 + 370 = 410