Question

calculeaza in doua moduri:​

Answer 1

Explicație pas cu pas:

a)(21+9)×10=30×10=300

(21×10)+(9×10)=210+90=300

b)100×(52+288)=100×340=34 000

(100×52)+(100×288)=5 200+28 800=34 000

c)(805-676)×1 000=129×1 000=129 000

(805×1 000)-(676×1 000)=805 000-676 000=129 000