CÁLCULO MENTAL (DE 0 ATÉ 30)
CONTAGENS DECRESCENTES E CRESCENTES
10+1=
10+2=
10+3=
10+4=
10+5=
10+6=
10+7=
10+8=
10+9=
10+10 = 20
20+1=
20+2=
20+3=
20+4=
20+5=
20+6=
20+7=
20+8=
20+9=
20+10 30
30+1=
30+2=
30+3=
30+4=
30+5=
30+6=
30+7=
30+8=
30+9=
30+10=40
10-1=
10-2=
10-3=
10-4=
10-5=
10-6=
10-7=
10-8=
10-9=
10-
10
=0
20-1=
20-2=
20-3=
20-4=
20-5=
20-6=
20-7=
20-8=
20-9=
20-
10
=10
30-1=
30-2=
30-3=
30-4=
30-5=
30-6=
30-7=
30-8=
30-9=
30-
10
=20
Verifica
AJUDA
OK