a/ ( 59 – 148 ) + 148
b/ ( – 2019 ) – ( 332 – 2019 )
c/ ( 88 – 117 ) + ( 117 – 288 )
d/ ( 39 – 87 + 40 ) – ( 39 – 60 – 87 )
e/ ( – 2020 ) + ( 246 + 2020 )
g/ 1416 – ( – 19 + 1416 )
h/ ( – 278 ) + ( – 56 + 278 – 44 )
a/ ( 59 – 148 ) + 148
b/ ( – 2019 ) – ( 332 – 2019 )
c/ ( 88 – 117 ) + ( 117 – 288 )
d/ ( 39 – 87 + 40 ) – ( 39 – 60 – 87 )
e/ ( – 2020 ) + ( 246 + 2020 )
g/ 1416 – ( – 19 + 1416 )
h/ ( – 278 ) + ( – 56 + 278 – 44 )
(59-148)+148
=59-148+148
=59
(-2019)-(332-2019)
=-2019-332+2019
=-332
(88-117)+(117-288)
=88-117+117-288
=-200
(39-87+40)-(39-60-87)
=39-87+40-39+60+87
=100
(-2020)+(246+2020)
=-2020+246+2020
=246
1416-(-19+1416)
=1416+19-1416
=19
(-278)+(-56+278-44)
=-278-56+278-44
=-100
Học tốt nhé! ^^
Đáp án:
Giải thích các bước giải:
a) ( 59 – 148 ) + 148
= 59 – 148 + 148
= 55 – ( 148 – 148 )
= 55 – 0
= 55
b) ( -2019 ) – ( 332 – 2019 )
= -2019 – 332 + 2019
= ( -2019 + 2019 ) – 332
= 0 – 332
= -332
c) ( 88 – 117 ) + ( 117 – 288 )
= 88 – 117 + 117 – 288
= ( 88 – 288 ) – ( 177 – 177 )
= -200 – 0
= -200
d) ( 39 – 87 + 40 ) – ( 39 -60 -87 )
= 39 – 87 + 40 – 39 + 60 + 87
= ( 39 – 39 ) – ( 87 – 87 ) + 40
= 0 – 0 + 40
= 40
e) ( -2020 ) + ( 246 + 2020 )
=-2020 + 246 + 2020
= ( -2020 + 2020 ) + 246
= 0 + 246
= 246
g) 1416 – ( -19 + 1416 )
= 1416 + 19 – 1416
= ( 1416 – 1416 ) + 19
= 0 + 19
= 19
h) ( -278 ) + ( -56 + 278 – 44 )
= -278 + ( -56 ) + 278 -44
= ( -278 + 278 ) + ( -56 – 44 )
= 0 + ( -100 )
= -100