1乘2.3乘4.5加3乘6.9乘13.5分之2乘4.6乘9加4乘9.2乘18是多少?
问题描述:
1乘2.3乘4.5加3乘6.9乘13.5分之2乘4.6乘9加4乘9.2乘18是多少?
答
1×2.3×4.5+3×6.9×2/13.5×4.6×9+4×9.2×18
=10.35+126.96+662.4
=799.71
答
(1×2.3×4.5+3×6.9×13.5)分之(2×4.6×9+4×9.2×18)
=1×2.3×4.5×(1+3×3×3)分之【1×2.3×4.5×(2×2×2+4×4×4)】
=(1+3×3×3)分之(2×2×2+4×4×4)
=28分之72
=7分之18