1) (740-240)+60=500+60=560
1) 740-(240+60)=740-300=440
2) (840-40):8=800:8=100
2) 840-(40:8)=840-5=835
3) (66-6)×9+1=60×9+1=540+1=
541
3) 66-(6×9)+1=66-54+1=12+1=
13
3) (66-6)×(9+1)=60×10=600
4)(120-20)+4×5=100+4×5=100+20=120
4)120-(20+4×5)=120-40=80
5)(500:100)×5=5×5=25
5) 500:(100×5)=500:500=1
6) 300:(10:10)=300:1=300
_41090 |_70__
350 | 587
_609
560
_490
490
0
1) 294|42 2) 140|35 3) 230|46
294|7 140 |4 230|5
=== ==== =====
0 0 0
4) 162|54 5) 252|63 6) 504| 84
162|3 252|4 504|6
==== ==== ====
0 0 0
7) 365:73+252×84=21 173
1) 365|73 2) 252 3) 21 168
365|5 × 84 + 5
==== ===== ======
0 1008 21 173
+ 2016
======
21 168
8) 390:65+224×32=
1)390|65 2) 224 3) 7 168
390|6 × 32 + 6
===== ===== ======
0 448 7 174
+672
=======
7 168
все да ????