92574:65= ???
10283:37=???
đừng tính máy tính ;92574:65= ??? ;10283:37=???
đừng tính máy tính ;92574:65= ??? ;10283:37=???
92574:65=
10283:37=
277,9189189189189189189189189189189189189189189189189189189189189189189189189189189..................................................................
Tính
a) ( 135 − 35 ) . ( − 37 ) + 37 ( − 41 − 59 )
b) − 65 ( 87 − 17 ) − 87 ( 17 − 65 )
c) 3 ( − 2 ) − ( − 8 ) . ( − 7 ) − ( − 2 ) . ( − 5 )
a) ( 135 − 35 ) . ( − 37 ) + 37 ( − 41 − 59 ) = − 100.37 + 37 − 100 = 37 − 100 − 100 = 37 − 200 = − 7400.
b) − 65 ( 87 − 17 ) − 87 ( 17 − 65 ) = − 65.87 + 65.17 − 87.17 + 87.65 = 87.65 − 65.87 + 17 65 − 87 = 0 + 17. − 22 = − 374.
c) 3 ( − 2 ) − ( − 8 ) . ( − 7 ) − ( − 2 ) . ( − 5 ) = − 6 + 8 . − 7 + 2 = 2. − 7 + 2 = − 12
Tính nhanh:
37 . 65 + 37 . 50 + 37 . 15
tính nhanh : a) 135-35.(-37)+37.(-42-48)
b ) -65.(87-17)-87.(17-65)
a)135-35.(-37)+37.(-42-48)=-4490
b)-65.(87-17)-87.(17-65)=-374
Hai @ bằng 22 chia đôi 99 làm như nào ak còn laik là 10283
64-(-37+65)+(-65+21-370+(-64)
64-(-37+65)+(-65+21-370+(-64))
=64-37-65+(-65)+21-370+(-64)
=(65+(-65))+((-64)+64)-(37+21-370)
=0+0-(-322)
=322
64-(-37+65)+(-65+21-370+(-64)
=64 + 37 - 65 -65 + 21 - 370 - 64
=- 442
Trần Tuyết Tâm
64-(-37+65)+(-65+21-370+(-64)
Cách1:
64-(-37+65)+(-65+21-370+(-64)
=64-28+-262
=36+-262
=-226
g) (15 + 37) + (52 – 37 – 17) h) (38 – 42 +14) - (38 – 42 - 15) i) (27 + 65 ) + (346 - 27- 65) k) - (27 + 65) - (346 – 27 - 65) l) (42 – 69 + 17) - (42 + 17) m) 24. (16 - 5) – 16. (24 – 5 ) n) (-12). 47 – 12 . 52 + (-12) p) 51 . (69 - 25) – 69. (51 - 25) |
g) (15 + 37) + (52 – 37 – 17) = 15 + 37 + 52 – 37 – 17 = 15 + 52 – 17 = 50 h) (38 – 42 +14) - (38 – 42 - 15) = 38 – 42 +14 - 38 + 42 + 15 = 14 + 15 = 29 i) (27 + 65 ) + (346 - 27- 65) = 27 + 65 + 346 - 27- 65 = 346 k) - (27 + 65) - (346 – 27 - 65) = -27 - 65 - 346 + 27 + 65 = -346 l) (42 – 69 + 17) - (42 + 17) = 42 – 69 + 17 - 42 - 17 = – 69 m) 24. (16 - 5) – 16. (24 – 5 ) = 24. 16 - 24 . 5 - 16 . 24 + 16. 5 = - 24 . 5 + 16. 5 = -8 . 5 = -40 n) (-12). 47 – 12 . 52 + (-12) = -12 (47 - 52 + 1) = -12 . (-4) = 48 p) 51 . (69 - 25) – 69. (51 - 25) = 51 . 69 - 51 . 25 – 69. 51 + 69. 25 = - 51 . 25 + 69. 25 = (- 51+ 69).25 = 450 |