Question

5.66*99+56.6*0.1（简便方法脱式计算）

（1）5/2+9/7-9/4+15/4

（2）0.8-15/7+5/1

（3）17/1+17/2+17/3+17/4+······+17/15+17/16

Answer 1

5.66*99+56.6*0.1
=5.66*99+5.66*1
=5.66*（99+1）
=5.66*100
=566

Answer 2

5.66*99+56.6*0.1
=5.66*99+5.66*10*0.1
=5.66*99+5.66*1
=5.66*(99+1)
=5.66*100
=566

Answer 3

5.66*99+56.6*0.1
=5.66*99+5.66*10*0.1
=5.66*99+5.66*1
=5.66*(99+1)
=5.66*100
=566（完整步骤）

Answer 4

你几年级呀，这个都不会！