15×50=750 96÷3=32 80×30=2400 4.3+2.6=6.9 600÷3=200 40×20=800
5.9-5.3=0.6 2700÷9=300 138÷7≈20 48×68≈3500 276÷9≈30 21×57≈1200 故答案为:750,32,2400,6.9,200,800,0.6,300,20,3500,30,1200.
15×50=750 96÷3=32 80×30=2400 4.3+2.6=6.9 600÷3=200 40×20=800
5.9-5.3=0.6 2700÷9=300 138÷7≈20 48×68≈3500 276÷9≈30 21×57≈1200 故答案为:750,32,2400,6.9,200,800,0.6,300,20,3500,30,1200.