Grocery Shopping II
Did you bring enough money for the groceries?
Goal:
Goal:
You know a lot of math facts! Are you ready to use them? Look at the cost of the last four items on your grocery list again.
$4 Remember to start with what you know. Look at the four numbers. Which two would you add together first? If you are good at making ten, and you see a 4 and a 6, you can add those together first.
$4 
$10 That leaves the numbers 9 and 8.
$4 
$10 If you don't know that fact by heart, you can use a number line. 
17 That's the second sum. Write 17 next to those two numbers. Now add the two sums together to find the answer.
$4
$10
$4
$10 Line up the numbers on top of each other. Do you start with the ones or the tens? Ones Yes! What is 0 + 7? Type the answer under the line in the ones column.
$4
$10
$4
$10 7 It's time to add the tens. What is 1 + 1? Type the answer under the line in the tens column. Then check your answer.
$4
$10 7
$4
$10 27 Remember that the first 4 items on the grocery list cost $8, and you just figured out that these 4 items cost $27. Now add these two numbers together to make sure you have enough money to buy everything on the list for dinner tonight.
$27 Add the ones together first. What is 7 + 8? Go to the number line. 
What number did you land on? 15 Yes, 8 + 7 = 15. Write the 5 under the ones column, and carry the 1 to the tens.
1 5 What is 1 + 2? Type the answer in the tens column.
1 5
1 35 Excellent work! All eight items cost $35. You have $40 dollars. Do you have enough money to buy everything on the list? 
Yes! This was a successful grocery shopping trip. Thanks for your help! Dinner is served. |
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