980:7+12*7=? 40*7+420:2=? 180:2+420:2=? 510:3-91:13=? 200*5-50*6=? 650:13-12*4=?. Created by lianatoloknova. matematika-ru

980:7+12*7=? 40*7+420:2=? 180:2+420:2=? 510:3-91:13=? 200*5-50*6=? 650:13-12*4=...

litata 980:7+12*7=140+84=224
40*7+420:2 = 280+210=490
180:2+420:2=90+210=300
510:3-91:13=170-7=163
200*5-50*6=1000-300=700
650:13-12*4=50-48=2

erika228336 ______________
1) 980÷7+12×7=224
1) 980÷7=140
2) 12×7=84
3)140+84=224
___________
2) 40×7+420÷2=490
1)40×7=280
2) 420÷2=210
3) 280+210=490
____________
3) 180÷2+420÷2=300
1) 180÷2=90
2) 420÷2=210
3) 90+210=300
_____________
4) 510÷3-91÷13=163
1) 510÷3=170
2) 91÷13=7
3) 170-7=163
______________
5) 200×5-50×6=700
1) 200×5=1000
2) 50×6=300
3) 1000-300=700
_______________
6) 650÷13-12×4=2
1) 650÷13=50
2) 12×4=48
3) 50-48=2
_______________

erika228336 ой

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