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100·(492:4+2880‬:20)= 13.700

1)492 : 4 = 123

2) 2880 : 20 = 144

3) 123 + 144 = 267

4) 267 x 100 = 26.700

 

2015-(1680+320):10= 1815

1)1680 + 320 = 2000

2) 2000 : 10 = 200

3) 2015 — 200 = 1815

 

8115-(2490-190):20= 8000

1)2490 — 190 = 2300

2)2300 : 20 = 115

3)8115 — 115 = 8000

 

(1000-80•5):60+390= 400

1)80 x 5 = 400

2) 1000 — 400 = 600

3) 600 : 60 = 10

4)390 + 10 = 400

 

16‧(5670:3-890)= 16.000

1)5670 : 3 = 1890

2) 1890 — 890 = 1000

3) 1000 x 16 = 16.000

 

(2000 + 60‧5) : 100 + 27= 50

1)60 x 5 = 300

2) 2000 + 300 = 2300

3) 2300 : 100 = 23

4) 23 + 27 = 50

 

50·(3600:12-360:20)= 1410

1)3600 : 12 = 300

2) 360 : 20 = 18

4) 300 — 18 =282

5) 282 x 50 = 1410

100·(492:4+2880‬:20)= 13.700

1)492 : 4 = 123

2) 2880 : 20 = 144

3) 123 + 144 = 267

4) 267 x 100 = 26.700

 

2015-(1680+320):10= 1815

1)1680 + 320 = 2000

2) 2000 : 10 = 200

3) 2015 — 200 = 1815

 

8115-(2490-190):20= 8000

1)2490 — 190 = 2300

2)2300 : 20 = 115

3)8115 — 115 = 8000

 

(1000-80•5):60+390= 400

1)80 x 5 = 400

2) 1000 — 400 = 600

3) 600 : 60 = 10

4)390 + 10 = 400

 

16‧(5670:3-890)= 16.000

1)5670 : 3 = 1890

2) 1890 — 890 = 1000

3) 1000 x 16 = 16.000

 

(2000 + 60‧5) : 100 + 27= 50

1)60 x 5 = 300

2) 2000 + 300 = 2300

3) 2300 : 100 = 23

4) 23 + 27 = 50

 

50·(3600:12-360:20)= 1410

1)3600 : 12 = 300

2) 360 : 20 = 18

4) 300 — 18 =282

5) 282 x 50 = 1410

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