tính nhanh
123 * 34 + 123 * 45 +123 * 20 + 123
tính nhanh
123:3+(123-66-57)=?
Giúp ạ!
tính hợp lí nếu có thể
a, 123+26.34+(-123)+26.66
B,-216-(-216 +34) -20
\(\frac{123}{123-45}-\frac{45}{67+34}=?\)
\(\frac{123}{123-45}-\frac{45}{67+34}=\frac{123}{78}-\frac{45}{101}=\frac{2971}{2626}\)
123123−45−4567+34=12378−45101=29712626123123−45−4567+34=12378−45101=29712626
Tính: a) 1074 + 253;b) |-123| + |-75|; c) 245 + |-34| d) (-34)+ (-45).
123^34+4356^45=?
Tính nhanh
a) 72. (-50).(-2).(-2)
b) 125.(-5).(-20).8
c) 125.(-3).(-32).(-4)
d) (-123 – 123-123-123).125
a)=\(\left[72.\left(-2\right)\right].\left[-50.\left(-2\right)\right]\)
=-144.100
=-14400
b)=(125.8).(-5).(-20)
=1000.100
=100000
c)=\(\left[125.\left(-4\right)\right]\).(-3).(-32)
=-500.96
=-48000
d)=-492.125
=-60500
a) -123.(2021-90) +2021.123 b) -123. ( 45- 33) + 33. ( 45-123 )
Tính:
a) (123 - 37) - 123; b) (-224) - (34 - 224);
c) 126 - (126- 33) d) (-53 - 23) - (567 - 53)
a) (123 - 37) -123 -123 - 37 -123 = (123 -123) - 37 = -37.
b) (-224) - (34 - 224) = -224 - 34 + 224 - (-224 + 224) - 34 = -34.
c) 126 - (126 - 33) = 126 -126 + 33 = 33.
d) (-53 - 23) - (567 - 53) - -53 - 23 - 567 + 53 = -590
a) (123 - 37) -123 -123 - 37 -123 = (123 -123) - 37 = -37.
b) (-224) - (34 - 224) = -224 - 34 + 224 - (-224 + 224) - 34 = -34.
c) 126 - (126 - 33) = 126 -126 + 33 = 33.
d) (-53 - 23) - (567 - 53) - -53 - 23 - 567 + 53 = -590