Question

简算：4.8+4.8×98+4.8=?8.27×0.99+0.827×0.1=?3.21+32.1×9.9=?3.14×

Answer 1

4.8+4.8×98+4.8=4.8 ×(1+98+1)=480

8.27×0.99+0.827×0.1=8.27×(0.99+0.01)=8.27

3.21+32.1×9.9=3.21×(1+99)=321

3.14×5.2-0.52×1.4=5.2×(3.14-0.14)=15.6

9.8×98=9.8×100-9.8×2=980-19.6=960.4