Question

Efectueaza:
a) 2x40=
3x70=
5x20=
6x50=
8x50=
10x50=
6x30=

b) 40x8=
50x9=
60x6=
70x7=
80x8=
90x9=
50x5=

c) 40x2x3=
50x4x2=
60x2x3=
80x2x3=
90x4x2=


va rog repede

Answer 1

a)
210
100
300
400
500
180
b)
220
450
360
490
640
810
250
c)
240
400
360
480
720

Answer 2

a) 2 · 40 = 80
3 · 70 = 210
5 · 20 = 100
6 · 50 = 300
8 · 50 = 400
10 · 50 = 500
6 · 30 = 180

b) 40 · 8 = 320
50 · 9 = 450
60 · 6 = 360
70 · 7 = 490
80 · 8 = 640
90 · 9 = 810
50 · 5 = 250

c) 40 · 2 · 3 =
80 · 3 = 240 

50 · 4 · 2 =
200 · 2 = 400

60 · 2 · 3 =
120 · 3 = 360 

80 · 2 · 3 =
160 · 3 = 480

90 · 4 · 2 =
360 · 2 =720