Question

254×0.032+2.54×7.9−25.4×0.11用简便方法计算？

Answer 1

本题简便计算过程如下:
254*0.032+2.54*7.9-25.4*0.11
=25.4*10*0.032+2.54*10*0.79-25.4*0.11
=25.4*0.32+25.4*0.79-25.4*0.11
=25.4*(0.32+0.79-0.11)
=25.4*(1.11-0.11)
=25.4*1
=25.4

Answer 2

254×0.032+2.54×7.9+25.4×0.11=（2.54×100）×0.032+2.54×7.9-（2.54×10）×0.11=2.54×（3.2+7.9-1.1）=2.54×10=25.4

Answer 3

254×0.032+2.54×7.9－25.4×0.11
＝25.4×0.32+25.4×0.79－25.4×0.11
＝25.4×(0.32+0.79-0.11)
＝25.4×1
＝25.4

Answer 4

254×0.032+2.54×7.9-25.4×0.11
=25.4×0.32+25.4×0.79-25.4×0.11
=25.4×（0.32+0.79-0.11）
=25.4×1
=25.4

Answer 5

将原式化为
2.54×100×0.032+2.54×7.9-2.54×10×0.11=2.54×（100×0.032+7.9-10×0.11）=2.54×（3.2+7.9－1.1）=2.54×10=25.4用这种方法，全程口算即可。