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# Multiplying money amounts - 4th grade math: estimation and word problem

In this 4th grade math lesson, we first practice multiplying money amounts and estimating the final result. Secondly, I work through a word problem that involves money, using a bar model to help.

The lesson continues with some word problems. In the first one, we can round the price \$11.95 up to \$12, which is just five cents more than the real price. Then, to find the price of four items, we can go 4 × \$12 = \$48, which is 4 × 5 cents too much... so the real total is \$47.80. The question is asking for change from \$50, which is now easy to figure out by adding up (mental math).

In the second problem, we find out how many \$0.80 cookies you can get with \$20. It turns out, instead of using division, it's easier to use multiplication and mental math to find the answer.

Use mental math (partial products) to multiply

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