h/ 144 + 78 + ( – 144) + ( – 178)
i/ ( – 567 ) – 443 + 67 + 43
k/ 29 . 131 – 31 . 29
l/ 72 . ( – 21) + ( – 21) . 28
m/ 35 . ( – 432) + 232 . 35
n/ 41 . ( – 155) + ( – 41) . 45
h/ 144 + 78 + ( – 144) + ( – 178)
i/ ( – 567 ) – 443 + 67 + 43
k/ 29 . 131 – 31 . 29
l/ 72 . ( – 21) + ( – 21) . 28
m/ 35 . ( – 432) + 232 . 35
n/ 41 . ( – 155) + ( – 41) . 45
Đáp án:
Giải thích các bước giải:
h/ 144 + 78 + ( – 144) + ( – 178)
=( 144-144) + [(-178) +78 ]
= 0 + (-100)
=-100
i/ ( – 567 ) – 443 + 67 + 43
= [(-567) – 443 ] + ( 67 +43)
= (-1010) + 110
= -900
k/ 29 . 131 – 31 . 29
= 29. ( 131 – 31)
= 29. 100
=2900
l/ 72 . ( – 21) + ( – 21) . 28
=(-21). (72+28)
= (-21). 100
= -2100
m/ 35 . ( – 432) + 232 . 35
=35 . ( -432+232)
= 35 . (-200)
= -7000
n/ 41 . ( – 155) + ( – 41) . 45
=41 . ( – 155) + 41 . (-45)
=41 . [ (-155) + (-45)]
=41 .(- 200)
=-8200
h) 144 + 78+ (-144)+(-178)
= [144+(-144)] +[78+(-178)]
= 0 + -100
= -100
i) (-567)-443+67+43
= [(-567)+67] +[443-43]
= -500 + 400
= -100
k) 29.131 – 31.29
= 29.(131-31)
=29.100
=2900
l) 72.(-21)+(-21).28
= (-21) . ( 72+28)
= (-21) . 100
= -2100
m) 35.(-432) + 232 . 35
= 35.[(-432)+232]
= 35.-200
= -7000
n) 41.(-155)+(-41).45
= [41+(-41)] . [(-155)+45]
= 0 . -110
= 0