56 + 34 =?
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
Bỏ ngoặc rồi tính: 1. (56+47)-(56-53+40) 2. (34+59)-(34-41-100) 3. (109+34)-(109-66+10)
1.\(=56+47-56+53-40\)
\(=\left(56-56\right)+\left(47+53\right)-40\)
\(=0+100-40=60\)
2.\(34+59-34+41+100\)
\(=\left(34-34\right)+\left(59+41\right)+100\)
\(=0+100+100=200\)
3.\(=109+34-109+66-10\)
\(=\left(109-109\right)+\left(34+66\right)-10\)
\(=0+100-10=90\)
tính nhanh:
3*4+3*56=?
34*56+34*59=?
a) 3 x 4 + 3 x 56
= 3 x (4 + 56)
= 3 x 60
= 180
b) 34 x 56 + 34 x 59
= 34 x (56 + 59)
= 34 x 115
= 34 x 100 + 34 x 10 + 34 x 5
= 3400 + 340 + 170
= 3910
a)
3*4+3*56
=3*(56+4)
=3*60=180
b)34*56+34*59
=34*(56+59)
=34*115
=3910
a) 34.(-56)-134.(56)
\(34.\left(-56\right)-134.56\)
\(=-56\left(34+134\right)\)
\(=-56.168=-9408\)
\(a,34.\left(-56\right)-134.\left(-56\right)\)
\(=\left(-56\right).\left(34-134\right)\)
\(=\left(-56\right).\left(-100\right)\)
\(=5600\)
Đề bài bạn viết thiếu kìa
Cậu ơi, 34.(-56) - 134.56 hay là 34.(-56) - 134.(-56) vậy
12+34+56+78+56=45+x-23=1234-x+56
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
56 + 34 = ?
56 + 45 = ?
56 + 34 = 90
56 + 45 = 101
Chúc bn hok tốt
\(56+34=90\)
\(56+45=101\)
hok tốt
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
Tính nhẩm:
85 – 5 = … | 74 – 3 = … | 56 – 1 = … |
85 – 50 = … | 74 – 30 = … | 56 – 10 = … |
85 – 15 = … | 74 – 34 = … | 56 – 56 = … |
Lời giải chi tiết:
85 – 5 = 80 | 74 – 3 = 7 | 56 – 1 = 55 |
85 – 50 = 35 | 74 – 30 = 44 | 56 – 10 = 46 |
85 – 15 = 70 | 74 – 34 = 40 | 56 – 56 = 0 |
56:2+56-12*2+67+34=?
56:2=28
28+56=84
12*2=24
84-24=60
60+67=127
127+34=161