Rounding
Round 53 to the nearest ten
50
Miss De Leon and Ms. Fontillas went to the candy store. Miss De Leon bought 27 pieces of gummy bears. Ms. Fontillas bought 34 pieces of sour gummy worms. How many pieces of candy did they buy in all?
They bought 61 pieces of candy.
Solve: 76 + 14
90
Solve: 87 - 21
66
True or False?
The Commutative Property is when you add numbers in an equation in any order.
For example: 4 + 5 = 5 + 4
True
Round 85 to the nearest ten
90
Irene and Chloe were doing arts and crafts with yarn. They needed 450 feet of yarn. Irene and Chloe already had 225 feet. How much more yarn did they need?
Solve: 83 + 29
112
Solve: 45 - 17
28
True or False?
The Associative Property is when you group numbers in an equation to solve for the sum.
For example: 8 + (5 + 5) = (8 + 5) + 5
True
Round 459 to the nearest hundred
500
Cade went to the store to buy new baseball shoes. The shoes he wanted costed $45. He brought $70 to spend. How much change will he get back if he buys the shoes?
He will get $21 back in change.
Solve: 478 + 105
583
Solve: 872 - 541
331
Does this equation use the Commutative or Associative Property?
2 + (8 + 8) = (2 + 8) + 8
Associative
Round 322 to the nearest hundred
300
Lanz and Daréy were playing basketball at recess. They scored a total of 54 points. Lanz scored 22 of those points. How many points did Daréy score?
Daréy scored 32 points.
Solve: 189 + 398
587
Solve: 934 - 277
657
Does this equation use the Commutative or Associative Property?
52 + 18 = 18 + 52
Commutative Property
Round 764 to the nearest ten
760
Brookelyn and L'Oreal went to the beach over the weekend. Together, they collected 423 seashells and stones. Brookelyn collected 216 of those seashells and stones. How much did L'Oreal collect?
L'Oreal collected 207 seashells and stones.
Solve: 632 + 389
1,021
Solve: 920 - 385
535
Does this equation use the Commutative or Associative Property?
17 + 83 = 83 + 17
Commutative Property