\(\left(-65\right)-\left(-37\right)=\left(-65\right)+37=-\left(65-37\right)=-28\)

\(\left(-159\right)-280\div\left(-7\right)=\left(-159\right)-\left(-40\right)=-119\)

\(\left(-12\right).3^2+240\div\left(-2\right)^2=\left(-12\right).9+240\div4=\left(-108\right)+60=-48\)

\(5.\left(-2\right)^3-36\div3^2=5.\left(-8\right)-36\div9=\left(-40\right)-4=-44\)

\(128-\left[68+8.\left(35-37\right)^2\right]\div\left(-4\right)=128-\left[69+8\left(-2\right)^2\right]\div4\)

\(=128-\left(69+8.4\right)\div4=128-101\div4=128-25,25=102,75\)

\(\left(-141\right)+3^3+\left(-2\right)^2=\left(-141\right)+27+4=\left(-141\right)+31=-110\)

(-65)-(-37)=(-65)+37= -28

(-12).3²+240:(-2)²=(-12).9+240:4=(-108)+60= -48

(-65)-(-37)=-65+37=-28

(-159)- 2180: (-7)= \(-159+\frac{2180}{7}=\frac{-1113+2180}{7}=\frac{1067}{7}\)

(-12).3²+240:(-2)²\(=-12.9+240.4=852\)

5.(-2)³-36:3²\(=5.\left(-8\right)-\frac{36}{9}=-40-4=-44\)

128-[68+8.(35-37)²]:(-4)\(=128-\frac{\left(68+8.2^2\right)}{4}=128-25=103\)

-141+3³+(-2)²\(=-141+27+4=-110\)

#Học tốt

10) 37.(27+25)-27.(37+25)=37.27+37.25-27.37-27.25

=37.25-27.25=25(37-27)=25.10=250

11)3.(-5+3)+7(2+5)=3.(-2)+7.7=-6+49=43

12)-3.(2-7)-6(8-5)=-3.(-5)-6.3=15-18=-3

a) 37. (27 +25)-27.(37+25)

= 37.52-27.62

= (37-27).(52-62)

= 10.-10

=-100

b) 3.(-5+3)+7.(2-5)

= 3.-2+7.-3

= (3+7).[(-2)-(-3)]

=10.1

=10

c) -3.(2-7)-6.(8-5)

= -3.-5-6.3

= (-3-6).(-5-3)

=(-9).(-8)

=72

tick nha

a) 35 x 34 + 35 x 38 + 65 x 75 + 65 x 45

  = 35 x (34+38)  + 65 x (75 + 45)

  = 35 x 72   +    65 x 120

  =  2520 + 7800 = 10320

b)  3 x 25 x 8 + 4 x 37 x 6 + 2 x 38 x 12

 = 3 x ( 25 x 8) + 4 x (37 x 6) + 2 x (38 x 12)

 = 3 x 200 + 4 x 222 + 2 x 456

= 600 + 888 + 912 = 2400

tk nha

35 x 34 + 35 x 38 + 65 x 75 + 65 x 45 

= 35 x ( 34 + 38 ) + 65 x ( 45 + 75 )

= 35 x 72 + 65 x 120

Vì quy tắc thực hiện tính toán phải làm nhân chia trước nên :

= (35 x 34)+(35 x 38)+(65 x 75)+(65 x 45)

= (1190 + 1330) + (4875 + 2925)

= 2520 + 7800

=10320

b) (3 x 25 x 8) +( 4 x 37 x  6) + (2 x 38 x 12)

= 600 + 888 + 912

= 2400

1. ( -37 ) + 14 + 26 + 37

=(-37+37)+(14+26)

=0+30

=30

2. ( -24 )+ 6 + 10 + 24

=(-24+24)+(6+10)

=0+16

=16

3. 15 + 23 + ( -25 ) + ( -32 )

=[15+(-25)]+[23+(-32)]

=-10+(-9)

=-19

4. 60 + 33 + ( -50 ) + ( -33 )

=[60+(-50)]+[33+(-33)]

=10+0

=10

5. (- 16 ) + ( -209 ) + ( -14 ) + 209

=[-16+(-14)]+(-209+209)

=-30+0

=-30

6.  (- 12 ) + ( -13 ) + 36 + ( -11 )

=[-12+(-11)]+(-13+36)

=-23+23

=0

7. - 16  + 24 - 16 - 34

=(24-34)-16-16

=-10-16-16

=-42

8.  25 + 37 - 48 - 25 - 37

=(25-25)+(37-37)-48

=0+0-48

=-48

9. 2575 + 37 - 48 - 25 - 37

=(2575-25)+(37-37)

=2550+0

=2550

10. 34 + 35 + 36 + 37 - 14 - 15 - 16 - 17

=(34-14)+(35-15)+(36-16)+(37-17)

=20+20+20+20

=20.4

=80

cái này giống BTVN của mk,nhưng dễ mak,tự làm đc mak

  cố lên

câu 1 bn sai ồi hoàng hôn 14+26=40 ko phải bằng 30

300

300

= 300 

tl nhanh hộ mik với

1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37

=(1+37)x37:2

=703

lop 1 khong co cau nay

Kết quả là 703 nha bạn