Question

7.93÷(0.47+2.13)的简便计算怎么算？

Answer 1

解：7.93÷(0.47+2.13)等于（ 61/20 ），【即等于3.05】
∵已知需求出7.93÷(0.47+2.13)等于多少
X ÷ Y = X / Y = Z
∴7.93 ÷ (0.47 + 2.13)
= （7×100+93）/100 ÷ 2.6
= 793/100 ÷ （ 2×10+6）/10
= 793/100 ÷ 26/10
= 793/100 ÷ 13/5
= 793/100 × 5/13
= 61/20
= 3.05
答：7.93÷(0.47+2.13)等于61/20，【即等于3.05】

Answer 2

7.93÷(0.47+2.13)
=7.93÷2.6
=(7.8+0.13)÷2.6
=7.8÷2.6+0.13÷2.6
=(2.6×3)÷2.6+0.13÷(0.13×20)
=3×(2.6÷2.6)+(0.13÷0.13)÷20
=3+0.05
=3.05

Answer 3

原式
＝7.93÷2.6
＝3.05