108
Dividing by 5
Textbook: Part 3, lesson 102, pp. 64–65
GoalDivide by 5; link division by 5 to the times table and to money.
New words
dividing by 5 · 5 ga bo‘lishbanknote · kupyurpack · qadoqchange · qaytim
Explanation
30 : 5 = 6, because 6 × 5 = 30. To pay 30 thousand so‘m with 5-thousand notes we need 5 + 5 + 5 + 5 + 5 + 5 = 30, that is 6 notes. The table for dividing by 5: 5 : 5 = 1, 10 : 5 = 2, 15 : 5 = 3, ... 50 : 5 = 10. Change = money given − price of the purchase.
Worked examples
45 : 5 = 9, because 9 × 5 = 45.
7 notebooks at 3 thousand each cost 3 × 7 = 21 thousand. Paying 50 thousand gives 50 − 21 = 29 thousand change.
Class activity
“Make change”: children count play money (5-thousand notes): “How many for 30 thousand?”, “How many for 45 thousand?” – and write the answer as a division.
Practice
1
30 : 5 = ?
6
2
45 : 5 = ?
9
3
Aziza’s shopping costs 30 thousand so‘m. How many 5-thousand notes will her mother count out?
6
4
40 boxes of biscuits are needed for a trip. If a pack holds 5 boxes, how many packs are needed?
8
5
Azim bought 7 notebooks at 3 thousand so‘m each and paid 50 thousand. How many thousand so‘m is the change?
29