4
Пошаговое объяснение:
2+2=4
4*1=4
если что )
2 1/6 + 2 5/12 = (2 + 2) + (2/12 + 5/12) = 4 7/12
9 3/8 +7 5/6 = (9 + 7) + (9/24 + 20/24) = 16 + 29/24 = 17 5/24
5 1/10 + 8 3/8 = (5 + 8) + (4/40 + 15/40) = 13 19/40
6 2/15 + 42 18/25 = (6 + 42) + (10/75 + 54/75) = 48 64/75
5 3/18 + 18 1/27 = (5 + 18) + (9/54 + 2/54) = 23 11/54
9 3/20 + 7 4/15 = (9 + 7) + (9/60 + 16/60) =
16 25/60 = 16 5/12 =
2 19/44 + 5 52/66 = (2 + 5) + (57/132 + 104/132) = 7 161/132 = 8 29/132
38 21/26 + 14 34/39 = (38 + 14) + (63/78 + 68/78) = 52 131/68 = 53 63/68 6 11/12 + 3 15/16 = (6 + 3) + (44/48 + 45/48) = 9 89/48 = 10 41/48
В решении.
Пошаговое объяснение:
508. Сразу решение:
1) -х=10 и 3/7 - 19 и 1/3
х= 19 и 1/3 - 10 и 3/7
х=9 и (7*1 - 3*3)/21 =
=8 и (28-9)/21=
=8 и 19/21;
2) -х= -30,2 + 22,25
х=30,2 - 22,25
х=7,95;
3) -х= -20 и 5/9 - 27 и 1/3
х= 20 и 5/9 + 27 и 1/3
х= 47 и (5+3)/9
х=47 и 8/9;
4) -х= -17 и 1/7 + 5,5
х= 17 и 1/7 - 5 и 1/2
х=12 и (2*1 - 7*1)/14=
=11 и (16-7)/14=
=11 и 9/14.
511. 1)
а) 8 и 1/42 - 12 и 4/21=
= - (12 и 4/21 - 8 и 1/42)=
= - (4 и (2*4-1)/42=
= -4 и 7/42=
= -4 и 1/6;
б) 5 и 1/42 - 3 и 3/7=
=2 и (1-6*3)/42=
=1 и (43-18)/42=
=1 и 25/42;
в) -4 и 1/6 - 1 и 25/42=
= -(4 и 1/6 + 1 и 25/42)=
= -(5 и (7+25)/42)=
= - 5 и 32/42=
= -5 и 16/21. ответ.
2)
а)25 и 5/8 - 28 и 1/2=
= -( 28 и 1/2 - 25 и 5/8)=
= -(3 и (4*1-5)/8)=
= -(2 и (12-5)/8)=
= -2 и 7/8;
б) -19 и 7/16 - (-2 и 7/8)=
= -19 и 7/16 + 2 и 7/8=
= -(19 и 7/16 - 2 и 7/8=
= -(17 и (7-14)/16)=
= - (16 и (23-14)/16)=
= -16 и 9/16;
в) -16 и 9/16 - 3/4=
= - (16 и 9/16 + 3/4)=
= -(16 и (9+12)/16)=
= -16 и 21/16=
= -17 и 5/16. ответ.
4 негра
2 негра плюс 2 негра дорівнює чотири негра