poziom A

a)

$250\cdot 10=2500$

b)

$18000:1000=18:1=18$

c)

$2760000:100=27600$

d)

$87600\cdot 1000=87600000$

e)

$250000:1000=250$

f)

$1900\cdot 100=190000$

 

poziom B

a)

$400\cdot 30=4\cdot 3\cdot 1000=12\cdot 1000=12000$ $400\cdot 30=4\cdot 3\cdot 1000=12\cdot 1000=12000$

b)

$500\cdot 200=5\cdot 2\cdot 10000=10\cdot 10000=100000$

c)

$900\cdot 60=9\cdot 6\cdot 1000=54000$

d)

$70\cdot 5000=7\cdot 5\cdot 10000=350000$

e)

$40\cdot 5000=4\cdot 5\cdot 10000=20\cdot 10000=200000$

f)

$7000\cdot 600=7\cdot 6\cdot 100000=4200000$

 

poziom C

a)

$130\cdot 200=26000$

b)

$6700\cdot 60=6000\cdot 60+700\cdot 60=360000+42000=402000$

c)

$30\cdot 2800=3\cdot 28\cdot 1000=3\cdot \left(20+8\right)\cdot 1000=\left(3\cdot 20+3\cdot 8\right)\cdot 1000=\left(60+24\right)\cdot 1000=84\cdot 1000=84000$

d)

$1700\cdot 5000=17\cdot 5\cdot 100000=\left(10+7\right)\cdot 5\cdot 100000=\left(10\cdot 5+7\cdot 5\right)\cdot 100000=\left(50+35\right)\cdot 100000=8500000$

e)

$420\cdot 3000=42\cdot 3\cdot 10000=\left(40+2\right)\cdot 3\cdot 10000=\left(40\cdot 3+2\cdot 3\right)\cdot 10000=\left(120+6\right)\cdot 10000=1260000$

f)

$8500\cdot 8000=85\cdot 8\cdot 100000=\left(80+5\right)\cdot 8\cdot 100000=\left(640+40\right)\cdot 100000=680\cdot 100000=68000000$

 

poziom D

a)

$5600:8=700$

b)

$48000:6=8000$

c)

$4000:8=500$

d)

$49000:7=7000$

e)

$200:4=50$

f)

$21000:3=7000$

 

poziom E

a)

$72000:900=720:9=80$

b)

$4000:40=400:4=100$

c)

$280000:7000=280:7=40$

d)

$240000:8000=240:8=30$

e)

$720000:720=72000:72=1000$

f)

$2000:50=200:5=40$