Odpowiedź:
zadanie 1
a) 98-42+7= 53+7=60
b) 71-26-6= 45-6=39
c) 54:9 x 3 = 6 x 3 = 18
d) 63:9+73= 7+73= 80
e) 42-2 x 5 = 42-10 = 32
f) 34+6 x 5 = 34+30=64
zadanie 2
a) 7 x 8-3 x 5 = 56-15= 41
b) 8 x (4+5)= 8 x 9 = 72
c) 7 x 10 + 18:3= 70+6= 76
d) 60-4 x (8 - 5) = 60-4 x 3= 60-12= 48
e) 4 x (7+5) - 15:3 = 4 x 12 - 5= 48-5 = 43
zadanie 3
a) 7 do 2 +7 x 2 = 49+7 x 2 = 49=14=63
b) 8 do 2 + 3 x 2 do 3 = 8 x 8 +3 x 2 x 2 x 2= 64+3 x 8 = 64+24= 88
c) (4+1) do 2 + 5 x 8 = 25 + 5 x 8 = 25 + 40 = 65
d) 3 x (5 do 2 + 2 do 3)= 3 x 25 + 8 = 75 + 8 = 83
Szczegółowe wyjaśnienie:
