a. \(\left(-37\right)+\left(-112\right)=-149\)
b. \(\left(-42\right)+52=10\)
c. \(13-31=-18\)
d. \(14-24-12=-22\)
e. \(\left(-25\right)+30-15=-10\)
a. (−37)+(−112)=−149(−37)+(−112)=−149
b. (−42)+52=10(−42)+52=10
c. 13−31=−1813−31=−18
d. 14−24−12=−2214−24−12=−22
e. (−25)+30−15=−10
a. (-37) + ( -112)
= - (37+ 112)
= -149
b. ( -42 ) + 52
= 52 - 42
= 10
c. 13 -31
= - (31-13)
= -18
d. 14 - 24 -12
=(14 - 24) -12
= - (24 - 14 ) -12
= - 10 - 12
= - (10 +12)
= - 22
e.( -25 ) + 30 -15
= -25 + 15
= - (25- 15)
= - 10
hoặc:
= 30 -25 -15
= 5 -15
= -10
