Question

小学奥数题 简便计算

(6.4×7.5×8.1)÷(3.2×2.5×2.7)

Answer 1

(6.4×7.5×8.1)÷(3.2×2.5×2.7)
=(6.4÷3.2）×（7.5÷2.5）×（8.1÷2.7)
=2×3×3
=18

Answer 2

6.4×7.5×8.1
=-------------
3.2×2.5×2.7

2×3×3
=-------（约分）
1×1×1

18
=----
1
=18

Answer 3

(6.4×7.5×8.1)/(3.2×2.5×2.7)
=2*3*3
=18

Answer 4

原式=(0.8×8 ×2.5×5 ×0.9×9)÷(0.4×8 ×0.5×5 ×0.3×9)
=0.8×8 ×2.5×5 ×0.9×9÷0.4÷8 ÷0.5÷5 ÷0.3÷9
=0.8÷0.4 ×8÷8 ×1.5÷0.5 ×9÷9 ×0.9÷0.3 ×5÷5
=2×1×3×1×3×1
=2×9
=18

Answer 5

＝（6.4×7.5×8.1）÷（4×0.8×2.5×2.7）
＝（6.4×7.5×8.1）÷（4×2.5×0.8×2.7）
＝（6.4×7.5×8.1）÷（8×2.7）
＝（8×0.8×7.5×2.7×3）÷（8×2.7）
＝0.8×7.5×3
＝0.8×2.5×3×3
＝2×9
＝18

Answer 6

=2*3*3=18