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Մաթեմատիկա 23.10.2018

210)

8x70x5=8x5x70=40×70=2800

5x5x6x4=5x5x4x6=100×6=600

5x5x5x4x4x4=5x4x5x4x5x4=20x20x20=8000

7x7x7x0x6x6x6=0

210)

բ)  6x30x5=5x6x30=30×30=900

3x70x10x2=2x10x3x70=210×20=4200

6x6x6x5x5x5=5x6x5x6x5x6=150×150=22500

8x8x8x0x9x9x9=0

4x5x10x2=20×20=800

6x10x5x8=40×60=2400

գ)6x(50×7)=(50×7)x6=350×6=2100

5x(80×90)=(80×90)x5=7200×5=36000

8x8x5=320

8x22x0=0

212)

Ա)

a=5

ax(20×43)=4300

ax(36×200)=3600

բ)

20x(ax63)=6300

200x(17xa)=17000

բ)

22x(ax0)=0

218x(0xa)=0

213)

Ա)

5ժ=18000վրկ

8օր=11520րպ

7ժ 18րպ=29280վրկ

5օր 18ժմ 18րպ=8298րպ

 

 

 

 

 

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