Toán Lớp 6: giúp nha em tớ cần gấp
[(-45) +32 ] +100
150 + ( 80 + 50 )
$\frac{5}{4}$ – 2 x $\frac{8}{2}$
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Toán Lớp 6: giúp nha em tớ cần gấp
[(-45) +32 ] +100
150 + ( 80 + 50 )
$\frac{5}{4}$ – 2 x $\frac{8}{2}$
Comments ( 2 )
[(-45)+32]+100
=[-45+32]+100
=-45+32+100
=(100-45)+32
=55+32
=87
b)
150+(80+50)
=150+80+50
=(150+50)+80
=200+80
=280
c)
5/4-2xx8/2
=5/4-2xx4
=5/4-8
=5/4-32/4
=(5-32)/4
=-27/4