2013苏州五年级希望杯数学备战题11答案
苏州奥数网
2013-01-16 15:08:43
答案：
设a=5.2×14.6-(9.2×5.2+5.4×3.7-4.6×1.5)
=5.2×14.6-9.2×5.2-5.4×3.7+4.6×1.5
=5.2×(14.6-9.2)-5.4×3.7+4.6×1.5
=5.2×5.4-5.4×3.7+4.6×1.5
=5.4×(5.2-3.7)+4.6×1.5
=5.4×1.5+4.6×1.5
=(5.4+4.6)×1.5
=15
所以结果就是:10-10.5÷15=10-0.7=9.3
