Question

0.98×4.8+0.89×5.2，简便解答

Answer 1

0.98×4.8+0.89×5.2
=0.98×4.8+0.98×5.2-0.1×5.2+0.01×0.52
=﹙4.8+5.2﹚×0.98-0.52+0.052
=9.8-0.52+0.052
=9.28+0.052
=9.332

Answer 2

解：原式=0.89x(4.8+5.2)+(0.98-0.89)x4.8 =0.89x10+0.432 =9.332

Answer 3

0.98×4.8+0.98×5.2=0.98×(4.8+5.2)=0.98×10=9.8

Answer 4

0.98×4.8+0.89×（10-4.8）
=0.98x4.8+8.9-0.89x4.8
=（0.98-0.89）x4.8+8.9
=0.09x4.8+8.9
=（1-0.1）x0.48+8.9
=0.48-0.048+8.9
=9.332

Answer 5

0.89*4.8+0.89*5.2=0.89*(4.8+5.2)=8.9