Question

d fill in the missing number.

1. 1× = 5
2. ×3 = 24
3. 4× = 40
4. ×4 = 36
5. 4× = 28
6. 6×1 =
7. 10× = 50
8. ×8 = 64
9. 4× = 16
10. ×9 = 81
11. 5× = 15
12. 2× = 16
13. ×7 = 49
14. 1× = 8
15. 6×9 =
16. ×10 = 70

Explanation:

Step1: Use division to find missing factor

For an equation of the form $a\times x = b$, we solve for $x$ by $x=\frac{b}{a}$.

1. For $1\times x = 5$, then $x=\frac{5}{1}=5$.
2. For $x\times3 = 24$, then $x=\frac{24}{3}=8$.
3. For $4\times x = 40$, then $x=\frac{40}{4}=10$.
4. For $x\times4 = 36$, then $x=\frac{36}{4}=9$.
5. For $4\times x = 28$, then $x=\frac{28}{4}=7$.
6. For $6\times1=x$, then $x = 6\times1=6$.
7. For $10\times x = 50$, then $x=\frac{50}{10}=5$.
8. For $x\times8 = 64$, then $x=\frac{64}{8}=8$.
9. For $4\times x = 16$, then $x=\frac{16}{4}=4$.
10. For $x\times9 = 81$, then $x=\frac{81}{9}=9$.
11. For $5\times x = 15$, then $x=\frac{15}{5}=3$.
12. For $2\times x = 16$, then $x=\frac{16}{2}=8$.
13. For $x\times7 = 49$, then $x=\frac{49}{7}=7$.
14. For $1\times x = 8$, then $x=\frac{8}{1}=8$.
15. For $6\times9=x$, then $x = 6\times9=54$.
16. For $x\times10 = 70$, then $x=\frac{70}{10}=7$.

Answer:

1. 5
2. 8
3. 10
4. 9
5. 7
6. 6
7. 5
8. 8
9. 4
10. 9
11. 3
12. 8
13. 7
14. 8
15. 54
16. 7