Toán Tính : a) (—38 ) + 28 ; b) 273 + ( — 123 ) ; 99 + (—100) + 101 26/11/2021 By Kinsley Tính : a) (—38 ) + 28 ; b) 273 + ( — 123 ) ; 99 + (—100) + 101
a) (-38 ) + 28 = -10 b) 273 + (-123) = 273 – 123 = 150 99 + (-100) + 101 = 99 – 100 + 101 = 100 Trả lời
a) (-38 ) + 28 = -10
b) 273 + (-123) = 273 – 123 = 150
99 + (-100) + 101 = 99 – 100 + 101 = 100
a) (-38) + 28 = – (38-28) = -10
b) 273+(-123)=273-123=150
c) 99+ (-100)+101= -1+101=100