1.25×2.5×32
=(1.25×8)×(2.5×4)
=10×10
=100
0.25×16.2×4
＝0.25×4×16.2
＝1×16.2
＝16.2
0.35×1.25×2×0.8
＝(0.35×2)×(1.25×0.8)
＝0.7×1
＝0.7