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Exercitile nr 4 si 5 clasa lv

Exercitile Nr 4 Si 5 Clasa Lv class=

Răspuns :

x-48x56=485
x-2688=485
x=485+2688
x=1173

25x57+x=2000
1425+x=2000
x=2000-1425
x=575

Sper ca te-am ajutat! (cu exercitiul 4)
4. 3×(24+57)
3×81=243
3×(24+57)=3×24+3×57=72+171=243

6×(84-56)=6×28=168
6×(84-56)=6×84-6×56=504-336=168

5×(3+41+6)=5x50=250
=5×5+5×41+5×6=15+205+30=250
5.48×56=2688
2688+348=×=3036

142×24=3408
3408-348=×=3060

25×57=1425
2000-1425=x=575