Toán Lớp 6: bỏ ngoặc rồi tính:159-524-(59-424)
(36+79)+(145-79-36)
334-(117+234)+(42+117)
271-[(-43)+271-(-17)]
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Toán Lớp 6: bỏ ngoặc rồi tính:159-524-(59-424)
(36+79)+(145-79-36)
334-(117+234)+(42+117)
271-[(-43)+271-(-17)]
Comments ( 2 )
=159 – 524 – 59 – 424
=(159 – 59) – (524 – 424)
=100 – 100
=0
(36 + 79) + (145 – 79 – 36)
=36 + 79 + 145 – 79 – 36
=(36 – 36) + (79 – 79) + 145
=0 + 0 + 145
=145
334 – (117 + 234) + (42 + 117)
=334 – 117 + 234 + 42 – 117
=(334 – 234) + (117 – 117) + 42
=100 + 0 + 42
=142
271 – [(-43) + 271 – (-17)]
=271 – 43 – 271 + 17
=(271 – 271) + (43 – 17)
=0 + 26
=26