Question

6.3×4-3.5×0.4-65×0.04的简便运算怎么写？

Answer 1

解：6.3×4-3.5×0.4-65×0.04
＝6.3×4-3.5×(0.1×4)-65×(0.01×4)
＝6.3×4-(3.5×0.1)×4-(65×0.01)×4
＝6.3×4-0.35×4-0.65×4
＝6.3×4-(0.35+0.65)×4
＝6.3×4-1×4
＝(6.3-1)×4
＝5.3×4
＝21.2

Answer 2

原式=6.3×4－0.35×4－0.65×4
=4×[6.3－(0.35+0.65）]
=4×5.3
=21.2

Answer 3

6.3×4+3.5×0.4-65×0.04=24
6.3×4=25.2
3.5×0.4=1.4
65×0.04=2.6
25.2+1.4-2.6=24
25.2+1.4=26.6
26.6-2.6=24

Answer 4

6.3×4-3.5×0.4-65×0.04
=63×0.4-3.5×0.4-6.5×0.4
=(63-3.5-6.5)×0.4
=53×0.4
=21.2

Answer 5

解： 6.3×4–3.5×0.4–65×0.04
=6.3×4×100–3.5×0.4×100–65×0.04×100
=630×4–35×4–65×4
=（630–35–65）×4
=530×4
=2120