Question

Спишите. Расставьте скобки так,чтобы равенства были верными.90:9 - 4*2=1290 :9 -4*2=3690:9 -4*2=90250:10+40*6=1250:10+40*6=30250:10+40*6=390

Answer 1

(90:9-4)*2=12
90:(9-4)*2=36
90:(9-(4*2))=90
250:(10+(40*69))=1
250:(10+40)*6=30
(250:10+40)*6=390

Answer 2

90:9 - (4*2) = 90:9 - 8 = 10 - 8 = 2

1290:9 - (4*2) = 143.33 - 8 = 135.33

3690:9 - (4*2) = 410 - 8 = 402

250:10 + (40*6) = 25 + 240 = 265

1250:10 + (40*6) = 125 + 240 = 365

250:10 + (40*6) = 25 + 240 = 265

Therefore, the corrected equations with parentheses are:

90:9 - (4*2) = 2

1290:9 - (4*2) = 135.33

3690:9 - (4*2) = 402

250:10 + (40*6) = 265

1250:10 + (40*6) = 365

250:10 + (40*6) = 265