tính nhanh: 317+425+a-217-325-a-36-64
a) 17+(-3) b) (-96)+64 c)75 +(-325)
a) 0+(-36) b)|-29|+9(-11) c)207+(-317)
Tính
a) ( 325 - 47 ) + ( 175 - 53 )
b) ( 756 - 217 ) - ( 183 - 53 )
c) ( -5 ) . 6 . ( -2 ) . 7
d) 24 . 36 - ( -24 ) . 64
e) 24 . 36 - ( -24 ) . 64
a,
\(\left(325-47\right)+\left(175-53\right)\\ =325-47+175-53\\ =325+175-47-53\\ =\left(325+175\right)-\left(47+53\right)\\ =500-100\\ =400\)
b,
\(\left(756-217\right)-\left(183-53\right)\\ =756-217-183+53\\ =756+53-217-183\\ =\left(756+53\right)-\left(217+183\right)\\ =809-400\\ =409\)
c,
\(\left(-5\right)\cdot6\cdot\left(-2\right)\cdot7\\ =\left[\left(-5\right)\cdot\left(-2\right)\right]\cdot\left(6\cdot7\right)\\ =10\cdot42\\ =420\)
d,
\(24\cdot36-\left(-24\right)\cdot64\\ =24\cdot36+24\cdot64\\ =24\cdot\left(36+64\right)\\ =24\cdot100\\ =2400\)
e,
\(24\cdot36-\left(-24\right)\cdot64\\ =24\cdot36+24\cdot64\\ =24\cdot\left(36+64\right)\\ =24\cdot100\\ =2400\)
Bài 1: Tính:
a) (325+175) - (47+53)
= 500-100=400.
b) (756-217) - (183-53)
= 539-150= 389.
c) (-5).(-2).6.7
= 10.42=420
d) 24.36- (-24).64
= 864- (-1536)
= 2400.
Tick mk nha bn!!!!!
Tính nhanh : a)(-147-173)-(127+247)
b)(-155)×61+155×(-38)-155
c) (-325)×(425-27)-425×(27-325)
d) (-6)× 43 +45×(-6)+12×(-6)
e) 5×(18-105)-105×(18-5)
Tính nhanh
a) (-147-173)-(127+247)
b)(-155)×61+155×(-38)-155
c)(-325)×(425-27)-425×(27-325)
d)(-6)×43+45×(-6)+12×(-6)
e) 5×(18-105)-105×(18-5)
a/317+(600-x)=517
b/325-(x+16)=425:17
c/25*(x-1)=0
d/713:(2x+17)=23
e/(x+a/3)*7/4=5-7/6
Tính nhanh:
a) 64+469+31+36
b) 25×2018×4
c) 325×78+325×22
d) 9×11×53+33×66×3+99
e) 259×268-259×168
f) 25×6×4×125×8
hello; how are you
a)
= (64 + 36) + (469 + 31)
= 100 + 500
= 600
b)
= 25 . 2018 . 4
= (25 . 4) . 2018
= 100 . 2018
= 201800
Tính nhanh :
a. 276+158-176
b. 175+217+325+283
Tính nhanh: \(\dfrac{16x48+16x24+16x28}{325-317+426-418}\)
\(=\dfrac{16\left(48+24+28\right)}{8+8}=48+52=100\)
Bài 3: Tính nhanh ( phân số )
\(16x48+16x24+16x28\)
325 - 317 +426 - 418 = ...................................................................
...................................................................
..................................................................
16 x 48 + 16 x 24 + 16 x 28
= 16 x ( 48 + 24 + 28)
= 16 x 100
= 1600
325 - 317 + 426 - 418
= ( 325 + 426 ) - ( 317 + 418 )
= 751 - 735
= 16
Tính hợp lí:
(-325). (425-27) - 425. (27-325)
\(\left(-325\right).\left(425-27\right)-425.\left(27-325\right)\)
\(=\text{ }\left[\left(-325\right).425-\left(-325\right).27\right]-\left(425.27-425.325\right)\)
\(=\left(-325\right).425-\left(-325\right).27-425.27+425.325\)
\(=\text{ }\left[\left(-325\right).425+425.325\right]-\text{ }\left[\left(-325\right).27+425.27\right]\)
\(=\text{ }\left\{425.\text{ }\left[\left(-325\right)+325\right]\right\}-\text{ }\left\{27.\text{ }\left[\left(-325+425\right)\right]\right\}\)
\(=\left(425.0\right)-\left(27.100\right)\)
\(=0-2700\)
\(=-2700\)