Estimates (Rounding Numbers to make a close guess)

59 + 98 = ?

• 60 + 100 = 160

• 30 + 100 = 140

• 200 + 100 = 300

Tags

CCSS.2.NBT.B.5

CCSS.1.NBT.C.4

179 + 291 = ?

• 100 + 300 = 400

• 180 + 300 = 480

• 80 + 300 = 380

32 + 59 = ?

• 50 + 80 = 130

• 30 + 60 = 90

• 15 + 40 = 45

Tags

CCSS.2.NBT.B.5

276 + 28 = ?

• 300 + 30 = 330

• 40 + 30 = 70

• 300 + 60 = 360

19 + 64 = ?

• 100 + 60 = 160

• 20 + 80 = 100

• 20 + 60 = 80

Tags

CCSS.2.NBT.B.5

CCSS.1.NBT.C.4

101 + 99 = ?

• 200 + 200 = 400

• 100 + 100= 200

• 150 + 100 = 250

169 + 21 = ?

• 170 + 20 = 190

• 70 + 20 = 90

• 100 + 20 = 120

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2