Mental Math
Problem Solving
Checkbook Math
Rounding
Preview Topic 3
100
53 + 11 + 7
What is 71? Here's a quick way 53+7 = 60 (7+3=10) 60 +11 = 71
100
Mrs. Cooper wants to buy four books for her classroom. The books cost $42.99, $32.25, $79.99 and $34.59. About how much money will all of the books cost?
What is around $190 to $200?
100
I had a balance in my checkbook of $457.32. I spent $25.00. What is the new balance?
What is $432.32?
100
Round 58 to the nearest hundred.
What is 100?
100
1,037 x ? = 1,037
What is x = 1?
200
1200 + 3400
What is 4600?
200
Emma wants to buy a fancy pencil for $2.45 and a notebook for $5.00. She borrows $3.00 from her mom. How much more money does Emma need to complete her purchase?
What is $4.45?
200
If I have $545.65 in my bank account. About how much do I need to add to have enough to purchase a new refrigerator for $735?
What is around $200?
200
Round 34.58 to the nearest ones.
What is 35.00 or 35?
200
5 x 20 x 9 = 5 x 20 x ?
What is 9?
300
Subtract 15 from 100
What is 85?
300
Isabella and Taylor sold 85 glasses of lemonade at their lemonade stand on Friday. On Thursday they sold 14 less glasses than on Friday. How many glasses of lemonade did they sell on Thursday?
What is 71 glasses of lemonade on Thursday?
300
If my bank balance is $24.53 and I add $56.78. What is my new balance?
What is $81.31?
300
Round 1.234 to the nearest hundredths
What is 1.23 or 1.230?
300
1234 x 345 =
What is 425,730?
400
657+223+2
What is 882?
400
The guinea pigs cage is about 70cm by 50cm. What is the approximate perimeter of their cage?
What is 240 cm?
400
If I spent $35.45 on books and $145 at a restaurant and my bank account balance was $5467.80. How much do I have now?
What is $5287.35?
400
Round 2,300,657 to the nearest millions
What is 2,000,000?
400
A banana contains 105 calories. Last week Hudson ate 14 bananas. How many calories were in the bananas that Hudson ate?
What is 1470 calories?
500
one million plus 8,000,000 minus 7,000,000
What is 2,000,000 (2 million)?
500
Xander exercises 2 hours each week in the summer. This is 35 more minutes than he exercises each week during the school year. How many minutes does he exercise per week during the school year?
What is 85 minutes? 2 hours = 120 minutes 120 min - 35 min = 85 minutes
500
Calculate $3456.98 + $345.76 - 234.56 - 32.45 - 34.00
What is $3501.73?
500
Round 24.097 to the nearest tenths.
What is 24.1?
500
Four bags with 7 apples in each bag contain the same amount as 7 bags with 4 apples in each bag. Which property of multiplication does this represent?
What is the commutative property? The order of factors can be changed but the product stays the same 7x4=4x7
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