4. Вычислите: а) 28 · 3 245; б) 187 · 408; в)360 · 24 500; г) 2 666 : 43; д) 16 632 : 54; е) 186000 : 150.

Решение:

а) 28 ⋅ 3245

28 ⋅ 3245 = 90860

б) 187 ⋅ 408

187 ⋅ 408 = 76300

в) 360 ⋅ 24500

360 ⋅ 24500 = 36 ⋅ 10 ⋅ 245 ⋅ 100 = 36 ⋅ 245 ⋅ 1000

36 ⋅ 245 = 8820

8820 ⋅ 1000 = 8820000

г) 2666 : 43

2666 : 43 = 62

д) 16632 : 54

16632 : 54 = 308

е) 186000 : 150

186000 : 150 = 18600 : 15

18600 : 15 = 1240

Ответ: а) 90860; б) 76296; в) 8820000; г) 62; д) 308; е) 1240.