Explain how you could use the distribute property and mental math to find 5 times 198

Multiply 100 times 5 in your head to get 500,

100 * 5 = 500

90 * 5 = 450

8 * 5 = 40

Put those 3 together into one equation, / /

(100 * 5) + (90 * 5) + (8 * 5) = 990 OR (100 * 5) + (98 * 5) = 990

depends on how distributed the teacher wants it to be.