Question

0.86×2.5-8.2×0.25怎么算

Answer 1

0.86×2.5-8.2×0.25，这道题应该先算乘除后算加减，所以要先算0.86×2.5=2.15和8.2×0.25=2.05，然后再用前者减后者就得到2.15-2.05=0.1，还有一种方法是将8.2×0.25中的0.25乘10那么8.2就要除以10，可以表现为0.82×2.5，那么前后两个算式中都有同一个被乘数2.5，可以把2.5提出来，就得到2.5×（0.86-0.82）=0.1

Answer 2

0.86ⅹ2.5-8.2ⅹ0.25
=2ⅹ0.34ⅹ2.5-8.2ⅹ0.25
=0.34x（2ⅹ0.25）-8.2ⅹ0.25
=0.34ⅹ（2ⅹ2.5）-2ⅹ4.1ⅹ0.25
=0.34ⅹ（2ⅹ2.5）-4.1ⅹ（2ⅹ0.5）
=0.34ⅹ5-4.1ⅹ（2ⅹ2.5）
=1.7-4.1ⅹ（2ⅹ0.5）
=1.7-4.1ⅹ0.5
=1.7-2.05
=-0.35

Answer 3

0.86x2.5-8.2x0.25
=（0.86×10）×（2.5÷10）-8.2x0.25
=8.6×0.25-8.2×0.25
=（8.6-8.2）x0.25
=0.4x0.25
=0.1

Answer 4

0.86X2.5-8.2X0.25
=2.15-2.05
=0.1
答：0.86x2.5-8.2x0.25等于0.1

Answer 5

0.86*2.5-8.2*0.25=8.6*0.25-8.2*0.25=（8.6-8.2）*0.25=0.4*0.25=0.1