17 + 3 = 31
23 + 5 = 38
32 + 9 = 55
Thì
38 + 8 = ?
1/ (-86) + (-14)
2/ 123 + (-36)
3/(-44) - (-66)
4/ -82 + (-28)
5/ 83 + (-17)
6/ (-83) - 33
7/ 73 +(-24)
8/ 84 + (-48)
9/ (-72) - (+82)
10/ (-97) - (+82)
11/ 19+ ( -92 )
12/ 38 - (+28)
13/ (+13) + (-27)
14/ (-85) + 29
15/ (-84 ) - (-27)
16/ -23 + 78
17/ 93 + (-29)
18/ ( -74) - 83
19/ (-183) + 83
20/ 849 - (-3832)
1. -86 + ( -14)
= -86 - 14
= -100
2. 123 + ( -36)
= 123 - 36
= 87
3. ( -44) - ( -66)
= -44 + 66
= 22
4. -82 + (-28)
= -82 - 28
= -110
5. 83 + ( -17)
= 83 - 17
= 66
Các bài khác làm tương tự nha bạn
1/ (-86)+(-14)=-86-14=-100
2/123+(-36)=123-36=87
3/(-44)-(-66)=-44+66=22
4/-82+(-28)=-82-28=-110
5/83+(-17)=83-17=66
6/(-83)-33=(-83)+(-33)=-116
7/ 73+(-24)=73-24=49
8/84+(-48)=84-48=36
9/-72-82=-72+(-82)=-154
10/-97-82=-97+(-82)=-179
11/19+(-92)=19-92=-73
12/38-28=10
13/13+(-27)=13-27=-14
14/-85+29=-85-(-29)=-114
15/-84-(-27)=-84+27=-57
16/-23+78=-23-(-78)=-101
17/93+(-29)=93-29=64
18/-74-83=-74+(-83)=-157
19/-183+83=-183-(-83)=-266
20/849-(-3832)=849+3832=4681
Có gì sai mong bạn sửa giúp mình nhé!
ối dồi ôi nhiều thế
mk chịu
1/ (-86) + (-14)
2/ 123 + (-36)
3/(-44) - (-66)
4/ -82 + (-28)
5/ 83 + (-17)
6/ (-83) - 33
7/ 73 +(-24)
8/ 84 + (-48)
9/ (-72) - (+82)
10/ (-97) - (+82)
11/ 19+ ( -92 )
12/ 38 - (+28)
13/ (+13) + (-27)
14/ (-85) + 29
15/ (-84 ) - (-27)
16/ -23 + 78
17/ 93 + (-29)
18/ ( -74) - 83
19/ (-183) + 83
20/ 849 - (-3832)
Đặt tính rồi tính
a.3123 + 1032
b.97856 – 23794
c.2135 x 153
d.18408 : 17
Tính nhẩm:
8 + 9 = ..... | 9 + 8 = ..... | 17 − 8 = ..... | 17 − 9 = ..... |
5 + 7 = ..... | 7 + 5 = ..... | 12 − 5 = ..... | 12 − 7 = ..... |
3 + 8 = ..... | 8 + 3 = ..... | 11 − 3 = ..... | 11 − 8 = ..... |
4 + 9 = ..... | 9 + 4 = ..... | 13 − 4 = ..... | 13 − 9 = ..... |
Phương pháp giải:
Tính nhẩm rồi điền số thích hợp vào chỗ trống.
Lời giải chi tiết:
8 + 9 = 17 | 9 + 8 = 17 | 17 − 8 = 9 | 17 − 9 = 7 |
5 + 7 = 12 | 7 + 5 = 12 | 12 − 5 = 7 | 12 − 7 = 5 |
3 + 8 = 11 | 8 + 3 = 11 | 11 − 3 = 8 | 11 − 8 = 3 |
4 + 9 = 13 | 9 + 4 = 13 | 13 − 4 = 9 | 13 − 9 = 4 |
8+9=17 9+8=17 17-8=9 17-9=8
5+7=12 7+5=12 12-5=7 17-7=5
bài 1:
a,1/10*2/9*3/8*4/7*5/6*6/5*7/4*8/3*9/2
b,8/11+4/17-5/11-3/17-65/9-8/17-3/17-6/17
bài 1 Tính:
a) 5/17 * 8/-7+8/17*-7/3+-7/3*4/17
b) -10/13 + 5/17 - 3/13 + 12/17 - 11/20
giúp tớ vs ạ. Tớ CẢM ƠN
*tớ thêm một câu nữa ạ
c) 5/9 * 7/13 + 5/9 * 9/13 + 3/13 * -5/9
a) 5/17 * 8/-7+8/17*-7/3+-7/3*4/17
-40/119 + 12/17 × -7/3
-40/119 + -28/17 =-236/119
b) -10/13 + 5/17 - 3/13 + 12/17 - 11/20
(5/17+12/17)-(10/13+3/13)-11/20
-11/20
a) 5/17 * 8/-7+8/17*-7/3+-7/3*4/17
-40/119 + 12/17 × -7/3
-40/119 + -28/17 =-236/119
b) -10/13 + 5/17 - 3/13 + 12/17 - 11/20
(5/17+12/17)-(10/13+3/13)-11/20
-11/20
-3/5+8/17+(-5/8)-3/5+9/17
\(=-\dfrac{3}{5}+\dfrac{8}{17}-\dfrac{5}{8}-\dfrac{3}{5}+\dfrac{9}{17}\)
\(=1-\dfrac{6}{5}-\dfrac{5}{8}\)
\(=-\dfrac{1}{5}-\dfrac{5}{8}\)
\(=-\dfrac{33}{40}\)
5/9 × 8/17+ 3/17 : 9/7 - 5/9
\(\dfrac{5}{9}\times\dfrac{8}{17}+\dfrac{3}{17}:\dfrac{9}{7}-\dfrac{5}{9}\\ =\dfrac{40}{153}+\dfrac{7}{51}-\dfrac{5}{9}\\ =\dfrac{61}{153}-\dfrac{5}{9}\\ =\dfrac{-8}{51}\)
5/9 × 8/17+ 3/17 : 9/7 - 5/9
\(\dfrac{5}{9}\times\dfrac{8}{17}+\dfrac{3}{17}:\dfrac{9}{7}-\dfrac{5}{9}=\dfrac{40}{153}+\dfrac{3}{17}\times\dfrac{7}{9}-\dfrac{5}{9}=\dfrac{40}{153}+\dfrac{21}{153}-\dfrac{5}{9}=\dfrac{61}{153}-\dfrac{5}{9}\)
\(=\dfrac{61}{153}-\dfrac{85}{153}=\dfrac{-24}{153}=\dfrac{-8}{51}\)
Ghi kết quả tính:
15 − 7 + 8 = ..... | 6 + 7 − 9 = ..... | 12 − 5 + 7 = ..... |
17 − 9 + 8 = ..... | 9 + 6 − 7 = ..... | 14 − 5 + 3 = ..... |
8 + 8 − 9 = ..... | 17 − 8 + 6 = ..... | 6 + 9 − 9 = ..... |
Phương pháp giải:
Tính nhẩm từ trái sang phải rồi điền kết quả vào chỗ trống.
Lời giải chi tiết:
15 − 7 + 8 = 16 | 6 + 7 − 9 = 4 | 12 − 5 + 7 = 14 |
17 − 9 + 8 = 16 | 9 + 6 − 7 = 8 | 14 − 5 + 3 = 12 |
8 + 8 − 9 = 7 | 17 − 8 + 6 = 15 | 6 + 9 − 9 = 6 |
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