Question

0.25×括号4-0.4括号简便运算

Answer 1

0.25x(4-0.4)
=0.25x4-0.25x0.4
=1-0.1
=0.9

Answer 2

0.25×括号4-0.4括号
= 0.25×4-0.25×0.4
= 1 - 0.1
= 0.9

Answer 3

0.25×3.6＝0.9