42 + 43 + 44 + 45 - 32 - 33 - 34 - 35

= (42 - 32)+(43 - 33)+(44 - 34)+(45 - 35)

= 10+10+10+10

= 40

(64+65+66+67+68) - (54+55+56+57+58)

= 64+65+66+67+68 - 54-55-56-57-58

= (64 - 54)+(65 - 55) +(66 - 56) + (67- 57) + (68 -58)

= 10+10+10+10+10

= 50

câu 1 40 
câu 2 50

nha

208

178

208

178

-(-33)-(-66+56-25)-(44-25)

=33+66-56+25-44+25

=(66-56)+(25+25)+(33-44)

=10+50-11=49

-(-33)-(-66+56-25)-(44-25) = 33+66-56+25-44+25 = 99-100+50 = 51

mik nha chế

1: =66+34-73-27+99=99

2: =54-45+30-54-30+5=-40

3: =42-56+33-33+56-42=0

4: =50-47-50+18+47-18=0

5: =10-28+30-4=2-4+10=12-4=8

\(\text{1.-(-66)+34+(-73)-27+99}.\)

\(=66+34-73-27+99=100-100+99=-99.\)

\(\text{2.54-(45-30+54)-30+5}.\)

\(54-45+30-54-30+5=\left(54-54\right)+\left(-45+5\right)+\left(30-30\right)=-40.\)

\(\text{3.42-56+33-(33-56+42)}.\)

\(=42-56+33-33+56-42=\left(42-42\right)+\left(-56+56\right)+\left(33-33\right)=0.\)

\(\text{4.50-(47+50-18)+(47-18)}.\)

\(=50-47-50+18+47-18=\left(50-50\right)+\left(-47+47\right)+\left(18-18\right)=0.\)

\(\text{5.10-(28-30+4)}.\)

\(=10-28+30-4=10+30-20-8-4=20-12=8.\)

\(\text{6.-(-73)+(44-94+27)+94}.\)

\(=73+44-94+27+94=\left(73+27\right)+\left(-94+94\right)+44=100+44=144.\)

56.(66-19)-6.(56-19)

=56. 47-6.37

=2632-222

=2410

không có cách tính hợp lý . k cho tớ nha

kết quả là 2410

éo k đấy làm j đc nhau

=4891

=4962

=4891 nha!

nhớ k cho mình lúc nào mình k lại cho!