34 + 23 = ????
56 - 22 = ????
Tính nhanh: 1 2 + − 1 2 + − 2 3 + 2 3 + 3 4 + − 3 4 + − 4 5 + 4 5 + 5 6 + − 5 6
1 2 + − 1 2 + − 2 3 + 2 3 + 3 4 + − 3 4 + − 4 5 + 4 5 + 5 6 + − 5 6 = 0
1 2 + − 1 2 + − 2 3 + 2 3 + 3 4 + − 3 4 + − 4 5 + 4 5 + 5 6 + − 5 6 = 0
Đây nha
bài 1:tính
a) 21+22+23+24-11-12-13-14
b) 34+35+36+37-14-15-16-17
c) 55+56+57+58-35-36-37-38
mik cần câu trả lời đúng nhất ❗
a: =(21-11)+(22-12)+(23-13)+(24-14)
=10+10+10+10
=40
b: =(34-14)+(35-15)+(36-16)+(37-17)
=20+20+20+20
=80
a, =(21-11)+(22-12)+(23-13)+(24-14)
=10+10+10+10
=40
b. =(34-14)+(35-15)+(36-16)+(37-17)
=20+20+20+20
=80
c,55+56+57+58-35-36-37-38
=111+57+58-35-36-37-38
=168+58-35-36-37-38
=226-35-36-37-38
=191-36-37-38
=155-37-38
=118-38
=80
34×23+56×23=?
409×34+124×34=?
a , 23(34+56) = 23* 90 = 2070
b , 33(409 + 124) = 33 * 633
34 x 23 + 56 x 23 = 23 x (34 + 56) = 23 x 90 = 2070
409 x 34 + 124 x 34 = 34 x (409 + 124) = 34 x 533 = 18122
24x23+56x23=23x(34+56=23=100=2300
409x34+124+34=34x(409+124)=34x533=12792
Tính nhanh
a) 5 13 + − 5 7 + − 20 41 + 8 13 + − 21 41
b) 1 28 + − 1 14 + 3 28 + − 1 7 + 3 14
c) 1 2 + − 2 3 + 3 4 + − 4 5 + 5 6 + − 5 6 + 4 5 + − 3 4 + 2 3 + − 1 2
a) 5 13 + − 5 7 + − 20 41 + 8 13 + − 21 41 = 5 13 + 8 13 + − 20 41 + − 21 41 + − 5 7 = − 5 7
b) 1 28 + − 1 14 + 3 28 + − 1 7 + 3 14 = 1 28 + 3 28 + − 1 14 + 3 14 + − 1 7 = 1 7
c) 1 2 + − 2 3 + 3 4 + − 4 5 + 5 6 + − 5 6 + 4 5 + − 3 4 + 2 3 + − 1 2 = 1 2 + − 1 2 + 3 4 + − 3 4 + − 4 5 + 4 5 + 5 6 + − 5 6 = 0
256, 23 + 12, 56 =
56, 23 + 12, 45 =
89, 67 - 23, 45 =
1, 23 + 34, 67
19, 56 + 45, 65 =
Điền dấu <, >, = vào ô trống:
23 + 23 – 11.... 22 + 22 – 10
56 + 21 – 15 .... 21 + 56 – 15
44 + 44 – 22 .... 46 + 41 – 26
\(23+23-11=22+23-10\)
\(56+21-15=21+56-15\)
\(44+44-22>46+41-26\)
\(23+23-11>22+22-10\)
\(56+21-15=21+56-15\)
\(44+44-22>46+41-26\)
Câu kia sai đừng k
23+23-11 = 22+22-10
56+21-15 = 21+56-15
44+44-22 < 46+41-26
Điền dấu <, >, = vào ô trống:
23 + 23 – 11.... 22 + 22 – 10
56 + 21 – 15 .... 21 + 56 – 15
44 + 44 – 22 .... 46 + 41 – 26
23 + 23 - 11 > 22 + 22 -10
56 + 21 - 15 = 21 + 56 - 15
44 + 44 - 22 > 46 + 41 - 26
23 + 23 -11 > 22 + 22 - 10
56 + 21 - 11 = 21 + 56 - 15
44 + 44 - 22 > 46 + 41 - 26
12+34+56+78+56=45+x-23=1234-x+56
23-34+34+56+13325+5^7=?