Câu hỏi của nguyen phuong anh

Question

Tính hợp lí:

a, (-236) x 41 + 236 x (-59)

b, 138 x (-125) -(-138) x 25

c, (-271) x (-159) + 271 x (-59)

d, 129 x (-73) + (-129) x 27)

e, 256 x (-57) - (-256) x (-43)

nghia · Accepted Answer

a, $\left(-236\right).41+236.\left(-59\right)=\left(-236\right).\left(41+59\right)=\left(-236\right).100=-23600$

b,$138.\left(-125\right)-\left(-138\right).25=138.\left[\left(-125\right)-\left(-25\right)\right]=138.100=13800$

c, $\left(-271\right).\left(-159\right)+271.\left(-59\right)=271.\left[159+\left(-59\right)\right]=217.100=27100$

d, $129.\left(-73\right)+\left(-129\right).27=129.\left(-73-27\right)=129.\left(-100\right)=-12900$

e, $256.\left(-57\right)-\left(-256\right).\left(-43\right)=256.\left(-57-43\right)=256.\left(-100\right)=-25600$

f, $\left(-234\right).67+234.\left(-33\right)=234.\left(-67-33\right)=234.\left(-100\right)=-23400$

Câu trả lời:

a, $\left(-236\right).41+236.\left(-59\right)=\left(-236\right).\left(41+59\right)=\left(-236\right).100=-23600$

b,$138.\left(-125\right)-\left(-138\right).25=138.\left[\left(-125\right)-\left(-25\right)\right]=138.100=13800$

c, $\left(-271\right).\left(-159\right)+271.\left(-59\right)=271.\left[159+\left(-59\right)\right]=217.100=27100$

d, $129.\left(-73\right)+\left(-129\right).27=129.\left(-73-27\right)=129.\left(-100\right)=-12900$

e, $256.\left(-57\right)-\left(-256\right).\left(-43\right)=256.\left(-57-43\right)=256.\left(-100\right)=-25600$

f, $\left(-234\right).67+234.\left(-33\right)=234.\left(-67-33\right)=234.\left(-100\right)=-23400$

bảo anh · Answer

ko cần chép đề nha

a. 236x(-41)+236x(-59)

=236x[(-41)+(-59)]

=236x(-100)

=-23600

b.-138x125-(-138)x25

=(-138)x(125-25)

=(-138)x100

=-13800

c.câu này mik giải thích là khi chuyển dấu "-" của -59 sang -271 thì -- sẽ biến thành +

c. 271x159+271x(-59)

=271x(159+(-59))

=271x100

=27100

d(-129)x73+(-129)x27

=(-129)x(73+27)

=(-129)x100

=-12900

e. (-256)x57-(-256)x(-43)

=(-256)x[57-(-43)]

=-256x100

=-25600