Question

0.25乘零点四加八的和简便运算

Answer 1

0.25ⅹ（0.4+8）
=0.25x0.4+0.25ⅹ8
=0.1+2
=2.1

Answer 2

0.25×4.8
=0.25×(4+0.8)
=0.25×4+0.25×0.8
=1+0.2
=1.2