Đáp án:
Giải thích các bước giải:
i) 32.(-315)+32.215
= 32.[(-315)+215]
= 32. 100
= 3200
j) 37.12-37.47+37.135
= 37.(12-47+135)
= 37. 100
= 3700
k) -19.32+19.(-68)+900
= 19.(-32)+19.(-68)+900
= 19.[(-32)+(-68)]+900
= 19. -100 + 900
= -1900+900
= -1000
l)39.(-23)+39.(-51)+61.(-74)
= 39.[(-23)+(-51)]+61.(-74)
= 39.(-74) + 61.(-74)
= (-74).(39+61)
= (-74). 100
= -7400
m)45.(-154)-45.(-54)
= 45.[(-154)-(-54)]
= 45.(-100)
= -4500
n)35.(25+147)-25.(35+147)
= 35.25+35.147-25.35+25.147
= 35.(25+147-25)+25.147
= 35. 147+25.147
= 147.(35+25)
= 147.60
= 8820
o)72.(12-62)-62.(12-72)
= 72.12-72.62-62.12-62.72
= 72.12-62.(72-12-72)
= 72.12-62.(-12)
= 72.12-(-62).12
= 12.[72-(-62)]
= 12.134
= 1608
p)(-2).(-25).4.(-5).(-8)
= [(-2).(-5)].[(-25).(-8)].4
= 10.200.4
= 8000
Đây bạn nha
~UwU~
