Tinh : (-127)-(+75)
Tinh nhanh
a)1272+146*127+732
b)98*28-(184-1)(184+1)
c)1002-992+982-972+...+22-12
d)(180^2-220^2)/125^2+150*125+75^2
tính nhanh
a) (127-375)-(127-75)
(127-375)-(127-75)
= (127-127) - (375-75)
= 0 - 300
= -300
a) \(\left(127-375\right)-\left(127-75\right)\)
\(=127-375-127+75\)
\(=\left(127-127\right)-\left(375-75\right)\)
\(=0-300\)
\(=-300.\)
\(\left(127-375\right)-\left(127-75\right)\)
\(=127-375-127+75\)
\(=\left(127-127\right)-\left(375-75\right)\)
\(=0-300\)
\(=-300\)
tính nhanh:
(127-375) - ( 127- 75 )
Giups mik vs cảm ơn
(127-375)-(127-75)
=127-375-127+75
=(127-127)-(375-75)
=0-300
=-300
(127-375)-(127-75)
=127-375-127+75
=(127-127)-(375-75)
=0-300
=-300
(127-375) - ( 127- 75 )= ( 127 - 127) + ( - 375+75)
= 0 - 300
= -300
Tìm x
12 7 : x + 2 3 = 7 5
Tìm x:
12 7 : x + 2 3 = 7 5
12 7 : x + 2 3 = 7 5 12 7 : x = 7 5 - 2 3 12 7 : x = 11 15 x = 12 7 : 11 15 x = 180 77
Tìm x: 12 7 : x + 2 3 = 7 5
tinh nhanh ;
127.(27-56)- 27 . (127 - 56)
127.(27 - 56) - 27.(127 - 56)
= 127.27 - 127.56 - 27.127 + 27.56
= (127.27 - 27.127) - (127.56 - 27.56)
= 0 - 56(127 - 27)
= 0 - 56.100
= 0 - 5600
= -5600
127.(27-56)- 27 . (127 - 56)
\(=\left(127-127\right)\cdot\left(27-27\right)\cdot\left(56-56\right)\)
\(=0\cdot0\cdot0\)
\(=0\)
75+791+125+1009/631-173+169-127 = ?
Tinh mot cach nhanh gon:
127:67
\(12^7.6^7=\left(12.6\right)^7=72^7=\text{10030613004288}\)
127 : 67
= (12 : 6)7
= 27
= 128