# 7th Grade Math Problem Solving

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Calculate probability by dividing the number of chances that the event or result will happen by the number of possible outcomes – for example, if there are 10 oranges, 5 peaches, and 15 apples in a bag, the probability of randomly selecting a peach is 5 out of 30 (5/30 or 1/6).

Calculate probabilities of simple and compound events.

For example, a 0.05a = 1.05a means that "increase by 5%" is the same as "multiply by 1.05."CCSS. For example: If a woman making \$25 an hour gets a 10% raise, she will make an additional 1/10 of her salary an hour, or \$2.50, for a new salary of \$27.50.

A.2Understand that rewriting an expression in different forms in a problem context can shed light on the problem and how the quantities in it are related. Apply properties of operations to calculate with numbers in any form; convert between forms as appropriate; and assess the reasonableness of answers using mental computation and estimation strategies.

This section of the nzmaths website has problem-solving lessons that you can use in your maths programme.