571×143=
To solve the problem 571×143, we will first convert both mixed numbers into improper fractions and then multiply them.
- Convert each mixed number to an improper fraction:
For 571: Multiply the whole number 5 by the denominator 7 and add the numerator 1: 5×7+1=36. Therefore, 571 becomes 736.
For 143: Multiply the whole number 1 by the denominator 4 and add the numerator 3: 1×4+3=7. Therefore, 143 becomes 47.
- Multiply the improper fractions:
Multiply the numerators: 36×7=252.
Multiply the denominators: 7×4=28.
Thus, 736×47=28252.
- Simplify the resulting fraction, 28252:
Divide both the numerator and denominator by their greatest common divisor, which is 28:
252÷28=9 and 28÷28=1.
So, 28252=9.
Therefore, the solution to the problem is 9.