More Related Content
More from mjollymathome (20)
Recently uploaded
Industrial Policy - 1948, 1956, 1973, 1977, 1980, 1991Industrial Policy - 1948, 1956, 1973, 1977, 1980, 1991RKavithamani
5-Cm13 développer-factoriser-14-15
- 15. 15 × 98 = 15 × (100 - 2)
= 15 × 100 - 15 × 2
= 1500 - 30 = 1470
Diapositive 2Diapositive 2
- 16. 12 × 99 = 12 × (100 - 1)
= 12 × 100 - 12 × 1
= 1200 – 12 = 1188
Diapositive 3Diapositive 3
- 17. 23 × 8,5 + 23 × 1,5
= 23 × (8,5 + 1,5)
= 23 × 10 = 230
Diapositive 4Diapositive 4
- 18. 4,25 × 12 – 4,25 × 2
= 4,25 × (12 - 2)
= 4,25 × 10 = 42,5
Diapositive 5Diapositive 5