Question

3.83乘0.49加0.51乘0.59加0.324乘4.9构简便方法？

Answer 1

3.83X0.49+0.51x0.59+0.324x4.9=3.83x0.49+0.51x(0.49+0.1)十3.24X0.49=(3.83+0.51+3.24)×0.49+0.051=7.58x0.49+0.051=3.765

Answer 2

3.83×0.49+0.51×0.59+0.324×4.9＝3.83×0.49+0.51×（0.49+0.1）+3.24×0.49＝谨滑辩0.49×（3.83+0.51+3.24）祥缺+0.51×0.1
＝让没0.49×7.57+0.051

Answer 3

3.83x0.49+0.51x0.59+0.324x4.9
= 3.83x0.49+0.324x4.9+0.51x0.59
=0.49x(3.83+3.24)+(0.5+0.01)x(0.6-0.01)
=0.49x7.07+0.3+0.006-0.005-0.0001
=(0.5-0.01)x7.07+0.306-0.0051
=3.535-0.0707 +0.306-0.0051
=3.841-0.0758
=3.7652