(-29).(85-47)-85.(47-29)
=(-29).85+29.47-85.47+85.29
=85.[(-29)+29]+47.(29-85)
=85.0+47.(-56)
=0+(-2632)
(-167) . (67-34) - 67 . ( 34- 167)
=-167.67+167.34 - 67.34+67.167
=167.34-67.34
=34.(167-67)
=34.100=3400
Tính nhanh:
a) 153.177-153.77+100.(-77)
b) (-29).(85-47)-85.(47-29)
c) (-167).(67-34)-67.(34-167)
=> THANKS TRƯỚC !!!
tinh nhanh
28(29-23) - 29(28-23)
(-167). (67-34)-67.(34-167)
Bàitoán2 : Tínhhợplý.
a. 4567 + (1234 – 4567) -4
b. 2001 – (53 + 1579) – (-53)
c. 35 – 17 + 2017 – 35 + (-2017)
d. 37 + (-17) – 37 + 77
e. –(-219) + (-219) – 401 + 12
f. |-85| – (-3).15
g. 11.107 + 11.18 – 25.11
h. 115 – (-85) + 53 – (-500 + 53)
k. (-18) + (-31) + 98 + |-18| + (-69)
l. 17. (15 – 16) + 16.(17 – 20)
m. 15.(-176) + 15.76 + 100.15
n. 79.89 – 79.(-11) – 100.79
o. 153.177 – 153.77 + 100.(-77)
p. -69.|-45| – 31.|45|
q. (-29).(85 – 47) – 85.(47 – 29)
r. (-167).(67 – 34) – 67.(34 – 167)
\(a.35-17+2017-35+\left(-2017\right)\)
\(b.37+\left(-17\right)-37+77\)
\(c.-\left(-219\right)+\left(-219\right)-401+12\)
\(d.|-85|-\left(-3\right).15\)
\(e.11.107+11.18-25.11\)
\(f.115-\left(-85\right)+53-\left(-500+53\right)\)
\(g.\left(-18\right)+\left(-31\right)+98+|-18|+\left(-69\right)\)
\(h.17.\left(15-16\right)+16.\left(17-20\right)\)
\(k.15.\left(-176\right)+15.76+100.15\)
\(l.79.89-79.\left(-11\right)-100.79\)
\(m.153.177-153.77+100.\left(-77\right)\)
\(n.-69.|-45|-31.|45|\)
\(o.\left(-29\right).\left(85-47\right)-85.\left(47-29\right)\)
\(p.\left(-167\right).\left(67-34\right)-67.\left(34-167\right)\)
cứ từ từ mà làm cũng đc
(-29).(85-47)-85.(47-29)
29( 85 - 47 ) + 85( 47 - 29 )
(-29).(85-47)-85.(47-29)
1.Tính nhanh
a.(-57).(67-34)-67.(34-57)
b.(-4).125.(-25).(-6).(-8)
c.(-98).(1-246)-246.98
d.237.(-26)+26.137
e.63.(-25)+25.(-23)
g.29.(19-3)-19.(29-13)
h.31.72-31.70+(-31).2
i.25.(32+47)-32.(25+47)
k.(135-35).(-37)+37.(-42-58)
Giúp mk nha cảm ơn nhìu
1.Tính nhanh
a.(-57).(67-34)-67.(34-57)
b.(-4).125.(-25).(-6).(-8)
c.(-98).(1-246)-246.98
d.237.(-26)+26.137
e.63.(-25)+25.(-23)
g.29.(19-3)-19.(29-13)
h.31.72-31.70+(-31).2
i.25.(32+47)-32.(25+47)
k.(135-35).(-37)+37.(-42-58)
Giúp mk nha cảm ơn nhìu
