Toán Lớp 6: a) 152 + (-73) – (-18) – 127
b) 7 + 8 + (-9) + (-10).
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Toán Lớp 6: a) 152 + (-73) – (-18) – 127
b) 7 + 8 + (-9) + (-10).
Comments ( 2 )
a)
= [152 – (-18)] -[127 – (-73)] = (152 + 18) – (127 + 73) = 170 – 200 = – 30
b)
=( 7+ 8 ) + [ ( -9) + ( – 10 ) ] = 15 – ( 9 + 10 ) = 15 – 19 = -4