Adding & Subtracting Whole Number Skills & Concepts

Adjusting one number to make a computation easier and balancing the adjustment by changing another number is called

• Compensation

• Compatible Numbers

Numbers that are easy to compute mentally are called

• Compensation

• Compatible Numbers

Tags

CCSS.1.OA.C.6

CCSS.2.OA.B.2

Using mental math, solve: 99+324

• 523

• 323

• 423

• 425

Tags

CCSS.2.NBT.B.7

Using mental math, solve: 9.04-6.98

• 2.06

• 16.02

• 2.07

• 2.04

Tags

CCSS.7.NS.A.1C

Estimate the sum of: 87.2+3.9

• 91

• 90

• 83

• 92

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.B.4

CCSS.5.NBT.B.7

Estimate the difference of: 788-572

• 100

• 300

• 1300

• 200

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.B.4

CCSS.5.NBT.B.7

Solve the following problem: 102,369+60,320

• 163,689

• 42,049

• 162,689

• 142,049

Tags

CCSS.4.NBT.B.4

Solve the following problem: 9,234-2,387

• 11,621

• 6,857

• 7,847

• 6,847

Tags

CCSS.4.NBT.B.4

Solve the following problem: 113,300-1,774

• 113,123

• 113,674

• 115,074

• 111,526

Tags

CCSS.4.NBT.B.4

Solve the following problem: 58,005-1,098

• 56,903

• 59,103

• 56,907

• 57,907

Tags

CCSS.4.NBT.B.4