117
Dividing by 8
Textbook: Part 3, lesson 110, pp. 82–83
GoalDivide by 8.
New words
dividing by 8 · 8 ga bo‘lishnumber divisible by 8 · 8 ga bo‘linadigan sonunknown dividend · noma’lum bo‘linuvchilanguage · til
Explanation
64 : 8 = 8, because 8 × 8 = 64. Numbers divisible by 8: 8, 16, 24, 32, 40, 48, 56, 64, 72, 80. To find an unknown dividend we multiply the quotient by the divisor: if x : 7 = 8 then x = 8 × 7 = 56.
Worked examples
56 : 8 = 7, because 7 × 8 = 56.
If 2 languages disappear every month, in 12 months 2 × 12 = 24 languages disappear.
Class activity
“Inside the table”: children divide the numbers of the 8 times table by 8 and notice that the quotients go from 1 to 10.
Practice
1
56 : 8 = ?
7
2
72 : 8 = ?
9
3
Every month 2 languages disappear in the world. How many disappear in a year (12 months)?
24
4
Solve: x : 7 = 8. x = ?
56
5
(64 : 8) + 17 = ?
25
6
How many times bigger is 32 than 8?
4