Răspuns:

3) 6 x 60 = 360 70 x 4 = 280 2 x 200=400 200x10=2000

320 : 40 = 8 450 : 5 = 90 900: 3 = 300 500:500=1

Explicație pas cu pas:

4) a) -40 0 40 80 160 200 240

b) 300 270 90 30 0

5) a)800: 40 +40 = 20+40 =60

b)800:(40+40) = 800: 80 = 10

c) 1000:5-5 = 200-5 = 195

d) 1000: (5 x 40) = 1000: 200 = 5

e) 30 x 4 : (600:30) = 30 x 4 : 20 =120:20 = 6

f) 20 x ( 7+ 18 ) : 50 = 20 x 25 : 50 = 500 : 50 = 10

coroana ?

Salut!

3)6×60=360

360:60=6

320:40=8

8×40=320

70×4=280

280:70=4

450:5=90

450:90=5

2×200=400

400:200=2

900:3=300

900:300=3

200×1=200

200:200=1

500:500=1

500:1=500

4.

a)10,20,40,80,160,320,640

b)810,270,90,30,10

5)

a)800:40+40

20+40

=60

b)800:(40+40)

800:80

=10

c)1000:5-5

200-5

195

d)1000:(5×40)

1000:200

=5

e)30×4:(600:30)

30×4:20

120:20

=6

f)20×(7+18):50

20×25:50

500:50

10