Question

1) -2.7 * (- 1.2) + 3.5 * (- 2.8) =2) - 7.4 * 0.6 - 3.8 * (- 2.3)+3) (-9.3 - 1.7 )/ (2.6+ (-5.9)) =4) 4 7/12 (смешанная дробь,четыре целых семь двенадцатых) * (-1 3/11) - (-1 1/15) * ( -45/64 (обыкновенная дробь, сорок пять шестьдесят четвертых) ) =5) - 81/88 * (- 6 +( -1 13/15) * (-1 19/21)) =6) (- 4/5 - 4/7 ) * (5 7/9 - 711/12) =

Answer 1

1) -2.7 * (- 1.2) + 3.5 * (- 2.8) =3.24-9.8=-6.56
2) - 7.4 * 0.6 - 3.8 * (- 2.3)=-4.44+8.74=4.3
3) (-9.3 - 1.7 )* (2.6+ (-5.9)) =-11*(-3.3)=36.3
4) 4 7/12 (смешанная дробь,четыре целых семь двенадцатых) * (-1 3/11) - (-1 1/15) * ( -45/64 (обыкновенная дробь, сорок пять шестьдесят четвертых) ) =55/12*(-15/11)+16/15*(-45/64)=-25/4-3/4=-28/4=-7
5) - 81/88 * (- 6 +( -1 13/15) * (-1 19/21)) =- 81/88 * (- 6 +28/9)=- 81/88 * (- 6 +3 1/9)=- 81/88 * (-2 8/9)=- 81/88*(-26/9)=117/44
6) (- 4/5 - 4/7 ) * (5 7/9 - 7 11/12) =(-48/35)*(-2 5/36)=28/15=1 13/15

Answer 2

1) 3,24 - 9,8 = -6,56
2) -4,44 + 8,74 = 4,3
3) -11 * (-3,3) = 36,3
4) 55/12 * (- 14/11) - (- 16/15 ) * (- 45/64) = - 35/6 - 3/4 = - 70/12 - 9/12 = - 79/12
5) - 81/88 * (-6 + 32/9) = - 81/88 * ( - 2 4/9) = 81/88 * 22/9 = 9/4
6)( - 48/35 ) * ( - 77/36) = 44/15 = 2 14/15

Answer 3

To solve the given expression, let's break it down step by step:

1) -2.7 * (-1.2) + 3.5 * (-2.8) We start by multiplying the numbers within the parentheses: -2.7 * (-1.2) = 3.24 3.5 * (-2.8) = -9.8 Now, we add the results: 3.24 + (-9.8) = -6.56

2) -7.4 * 0.6 - 3.8 * (-2.3) Again, we multiply the numbers within the parentheses: -7.4 * 0.6 = -4.44 -3.8 * (-2.3) = 8.74 Now, we subtract the results: -4.44 - 8.74 = -13.18

3) (-9.3 - 1.7) / (2.6 + (-5.9)) We simplify the numbers within the parentheses: -9.3 - 1.7 = -11 2.6 + (-5.9) = -3.3 Now, we divide the results: -11 / -3.3 = 3.333...

4) 4 + 7/12 * (-1 + 3/11) - (-1 + 1/15) * (-45/64) Let's evaluate each part separately: 7/12 * (-1 + 3/11) = 7/12 * (-(11/11) + 3/11) = 7/12 * (-8/11) = -14/33 (-1 + 1/15) * (-45/64) = (-15/15 + 1/15) * (-45/64) = (-14/15) * (-45/64) = 7/8 Now, we add and subtract the results: 4 + (-14/33) - 7/8 = 128/33 - 14/33 - 231/33 = -117/33 = -3.545...

5) -81/88 * (-6 + (-1 + 13/15) * (-1 + 19/21)) Let's evaluate each part separately: (-1 + 13/15) * (-1 + 19/21) = (-15/15 + 13/15) * (-21/21 + 19/21) = (-2/15) * (-2/21) = 4/315 Now, we multiply: -81/88 * (-6 + 4/315) = -81/88 * (-1890/315 + 4/315) = -81/88 * (-1886/315) = 15246/2772 = 5.500...

6) (-4/5 + 4/7) * (5 + 7/9 - 711/12) Let's evaluate each part separately: -4/5 + 4/7 = (-28/35 + 20/35) = -8/35 5 + 7/9 - 711/12 = (60/12 + 7/9 - 711/12) = (-591/12 + 7/9) = -6983/108 Now, we multiply: (-8/35) * (-6983/108) = 55744/1890 = 29.494...

Therefore, the solution to the given expression is: 1) -6.56 2) -13.18 3) 3.333... 4) -3.545... 5) 5.500... 6) 29.494...