Question

Află produsele, urmând modelui:
7 x 346 = 7 x (300 + 40 + 6) = 7 x 300 + 7 x 40 + 7 x 6
= 2 100 + 280 + 42
= 2422
4 x 985 =
7 x 578 =
9 x 349 =
6 x 894 =
8 x 584 = va rog urgent acum​

Answer 1

Răspuns:

4×985=4×(900+80+5)=4×900+4×80+4×5=3600+320+20=3940

7×578=7×(500+70+8)=7×500+7×70+7×8=3500+490+56=4046

9×349=9×(300+40+9)=9×300+9×40+9×9=2700+360+81=3141

6×894=6×(800+90+4)=6×800+6×90+6×4=4800+540+24=5364

8×584=8×(500+80+4)=8×500+8×60+8×4=4000+480+32=4512