1.5x105、2.33x0.5x4、1.2x2.5+0.8x2.5这三个用简便算法怎么算?

2024年11月28日 14:37
有3个网友回答
网友(1):

1.5x105
=1.5×(100+5)
=150+7.5
=157.5

2.33x0.5x4
=2.33×2
=4.66

1.2x2.5+0.8x2.5
=0.3×4×2.5+0.2×4×2.5
=0.3×10+0.2×10
=3+2
=5

网友(2):

1.5x105
=1.5×100+1.5×5
=150+7.5
=107.5

2.33x0.5x4
=2.33×(0.5×4)
=2.33×2
=4.66

1.2x2.5+0.8x2.5
=2.5×(1.2+0.8)
=2.5×2
=5

网友(3):

1.5x105

1.2x2.5+0.8x2.5
=2.5×(1.2+0.8)
=2.5×2
=5 =1.5×(100+5)
=150+7.5
=157.5

2.33x0.5x4
=2.33×(0.5×4)
=2.33×2
=4.66