Question

990÷ (640÷64)990-(640÷64)990÷(10)99answer
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Answer 1

$\huge\boxed{\tt\underline{Answer}}$

$= 990÷ (640÷64)990-(640÷64)990÷(10)99$

$= 990 \div (640 \div 64) \times 990 - (640 - 64) \times 990 \div 10 \times 99$

$= 990 \div 10 \times 990 - 576 \times 990 \div 10 \times 99$

$= 98010 - 5645376$

$= - 5547366$

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