Question

第一题：4,88X0.9+0,488怎么简算。第二题：3.9X0.25+4.1除4怎么简算。

要简算！！！

Answer 1

4,88X0.9+0,488
=4.88X0.9+4.88X0.1
=4.88X1
=4.88

3.9X0.25+4.1/4
=3.9X0.25++4.1X0.25
=(3.9+4.1)X0.25
=8X0.25
=2

Answer 2

4,88X0.9+0.488
=4.88x0.9+4.88x0.1
=4.88x(0.9+0.1)
=4.88x1
=4.88

3.9X0.25+4.1÷4
=3.9x0.25+4.1x0.25
=0.25x(3.9+4.1)
=0.25x8
=2

Answer 3

4.88×0.9＋0.488
＝4.88×0.9＋4.88×0.1
＝4.88×（0.9＋0.1）
＝4.88×1
＝4.88

3.9×0.25＋4.1÷4
＝3.9×1/4＋4.1×1/4
＝（3.9＋4.1）×1/4
＝8×1/4
＝2

Answer 4

0.488 x 9 +0.488=0.488 x （9+1）