14.6×5.4-5.4×4.6
=(14.6-4.6)×5.4
=10×5.4
=54
1.25×0.7×0.8=1.25×0.8×0.7=1×0.7=0.7
1.25乘3.2乘2.5怎么做简便3.57减0.12减2.88加2.43简便
追问太多系统会扣你的财富,呵呵。1.25×3.2×2.5=1.25×(8×0.4)×2.5=(1.25×8)×(0.4×2.5)=10×1=103.57减0.12减2.88加2.43=(3.57+2.43)-(0.12+2.88)=6-3=3请先采纳后,再提问。