Question

1) -7,8*(-7) 2) -4 целых 4 девятых*(-1 целая 1 восьмая) 3) 18:(-6)

Answer 1

1) -7,8*(-7)=54,6

2)-4 4/9*(-1 1/8)=40/9*9/8=5

3)18:(-6)=-3

Answer 2

Let's solve each of the given mathematical expressions step by step:

1. -7 + 8 * (-7): To evaluate this expression, follow the order of operations (PEMDAS/BODMAS), which stands for Parentheses/Brackets, Exponents/Orders, Multiplication/Division, and Addition/Subtraction. -7 + 8 * (-7) = -7 + (-56) (Multiplication first) = -7 - 56 (Negative times negative is positive) = -63 (Addition)

2. -4 целых 4 девятых * (-1 целая 1 восьмая): In this expression, it seems like you are using Russian fractional notation, where "целых" represents whole numbers, "девятых" represents ninths, and "восьмая" represents eighths. Convert the fractions to decimal notation for easier calculation. -4 целых 4 девятых = -4 + 4/9 = -4.444... -1 целая 1 восьмая = -1 + 1/8 = -1.125

   Now, multiply the decimals: -4.444... * (-1.125) ≈ 5.000... (rounded to 3 decimal places)

3. 18 / (-6): This is a simple division problem. 18 / (-6) = -3

To summarize the results:

1. -7 + 8 * (-7) = -63
2. -4 целых 4 девятых * (-1 целая 1 восьмая) ≈ 5.000...
3. 18 / (-6) = -3