Question

doc 9 +75)3=24:353
8
-
2 După modelul (8 + 4): 2 = (8:2)+(4:2) = 4 + 2 = 6, calculează:
2
a) (20 + 10):5=
b) (12 +9):3 =
c) (16+8):4=
d) (25 + 15):5=
N
După modelul (18-6):3 = 12:3 = 4, efectuează:
a) (20 - 10):5= b) (15 - 6:3= c) (18-8): 2 =
d) (24-16):4=
=​

Answer 1

Răspuns:

1. a) (20+10):5= (20:5)+(10:5)= 4+2=6

b) (12+9):3= (12:3)+(9:3)= 4+3=7

c) (16+8):4= (16:4)+(8:4)= 4+2=6

d) (25+15):5= (25:5)+(15:5)= 5+3=8

2. a) (20-10):5= 10:5=2

b) (15-6):3=9:3=3

c) (18-8):2=10:2=5

d) (24-16):4= 8:4=2