76+13=89 58-24=34 85-62=23 22+45=67 67-36=31 47+32=80
76=70+6 58=50+8 85=80+5 22=20+2 67=60+7 47=40+7
13=10+3 24=20+4 62=60+2 45=40+5 36=30+6 32=30+2
(70-6)+(10-3)=71 (50-8)+(20-4)=58 (80-5)+(60-2)=133 (20-2)+(40-5)=53
(60-7)+(30-6)=77 (40-7)+(30-2)=61
дальше не поняла
601 задание
S= (9*24+9*11+24*11) *2
S=1158 м кв.
Ответ:
Пошаговое объяснение:
а) 7791 + 893 – 890 = 7791 + (893 - 890) = 7791 + 3 = 7794
e) 1232 - 134 – 1232 + 131 = (1232 - 1232) + (131 - 134) = 0 + (-3) = -3
b) 6133 – 877 + 867 = 6133 - (877 - 867) = 6133 - 10 = 6123
f) 252 - 11234 - 250 - 11234 = (252 - 250) - (11234 + 11234) =
= 2 - 22468 = -22466
c) 2465 + 1247 - 247 = 2465 + (1247 - 247) = 2465 + 1000 = 3465
g) 120 - 345 + 120 - 155 = (120 + 120) - (345 + 155) = 240 - 500 = -260
d) 23170 – 16574 + 16174 = 23170 - (16574 - 16174) = 23170 - 400 = 22770
h) 5248 - 24 + 5248 - 76 = (5248 + 5248) - (24 + 76) = 10496 - 100 = 10396