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Andrew7733
@Andrew7733
September 2021
1
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Вычисли удобным способом
а) (55 + 97) + 3
17 + 24 + 38 + 52 + 6
(183 + 17) + 345
425 + (75 + 143)
б) (129 +74 -29
(863+471) -371
(119+281) - 300
(360 + 225) - 285
в) 538 - (142 + 138
673 - (223 + 130)
811 - (167 + 133)
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Giammy
Verified answer
а) (55 + 97) + 3= 55+(97+3)=155
17 + 24 + 38 + 52 + 6= (24+6)+(38+52)+17=30+90+17=137
(183 + 17)
+ 345=200+345=545
425 + (75 + 143)=(425+75)+143=500+143=643
б) (129 +74) -29=(129-29)+74=174
(863+471) -371=863+(471-371)=963
(119+281)
- 300=400-300=100
(360 + 225)
- 285=585-285=300
в) 538 - (142 + 138)=
538
-142
-138
=400-142=258
673 -
(223 + 130)
=673-353=220
811 -
(167 + 133)
=811-300=511
52 votes
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Verified answer
а) (55 + 97) + 3= 55+(97+3)=15517 + 24 + 38 + 52 + 6= (24+6)+(38+52)+17=30+90+17=137
(183 + 17) + 345=200+345=545
425 + (75 + 143)=(425+75)+143=500+143=643
б) (129 +74) -29=(129-29)+74=174
(863+471) -371=863+(471-371)=963
(119+281) - 300=400-300=100
(360 + 225) - 285=585-285=300
в) 538 - (142 + 138)=538-142-138=400-142=258
673 - (223 + 130)=673-353=220
811 - (167 + 133)=811-300=511