Question

数学题：4.7x0.35+0.47x4.2+0.047x23 能用简便的方法计算吗？

4.7x0.35+0.47x4.2+0.047x23 能用简便的方法计算吗？

Answer 1

4.7x0.35+0.47x4.2+0.047x23
=0.47*3.5+0.47*4.2+0.47*2.3
=0.47*(3.5+4.2+2.3)
=0.47*10=4.7
通过小数点的移位变成全部有0.47

Answer 2

4.7x0.35+0.47x4.2+0.047x23
=4.7x0.35+4.7x0.42+4.7x0.23
=4.7(0.35+0.42+0.23)
=4.7x1
=4.7

Answer 3

4.7*0.35+0.47*4.2+0.047*23
＝4.7*0.35+4.7*0.42+4.7*0.23
＝4.7*（0.35+0.42+0.23）
＝4.7*1
＝4.7

Answer 4

原式=4.7×（0.35+0.42+0.23）=4.7×1=4.7